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SCIENTIFIC JOURNALS & PROCEEDINGS
 
  • Control of microswimmers by spiral nematic vortices:
    Transition from individual to collective motion and contraction, expansion, and stable circulation of bacterial swirls
  • RUNA KOIZUMI, TARAS TURIV, MIKHAIL M. GENKIN, ROBERT J. LASTOWSKI, HAO YU, IRAKLI CHAGANAVA, QI-HUO WEI, IGOR S. ARANSON, AND OLEG D. LAVRENTOVICH
    Physical Review Research
  • American Physical Society (ISSN 2469-9896), Volume 2, Issue 3, 033060 (13 July 2020); doi: 10.1103/PhysRevResearch.2.033060
     
    Abstract: 

    Abstract:
    Active systems composed of self-propelled units show fascinating transitions from Brownian-like dynamics to collective coherent motion. Swirling of swimming bacteria is a spectacular example. This study demonstrates that a nematic liquid crystal environment patterned as a spiral vortex controls individual-to-collective transition in bacterial swirls and defines whether they expand or shrink. In dilute dispersions, the bacteria swim along open spiral trajectories, following the preimposed molecular orientation. The trajectories are nonpolar. As their concentration exceeds some threshold, the bacteria condense into unipolar circular swirls resembling stable limit cycles. This collective circular motion is controlled by the spiral angle that defines the splay-to-bend ratio of the background director. Vortices with dominating splay shrink the swirls toward the center, while vortices with dominating bend expand them to the periphery. Spiraling vortices of 45° with splay-bend parity produce the most stable swirls. All the dynamic scenarios are explained by hydrodynamic interactions of bacteria mediated by the patterned passive nematic environment and by the coupling between the concentration and orientation. The acquired knowledge of how to control individual and collective motion of microswimmers by a nematic environment can help in the development of microscopic mechanical systems.

    © (2020) the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license.
    Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

    impact factor
    NEW
      Direct URL (Uniform Resource Locator):
    https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.2.033060

 

  • The role of conductivity and molecular mobility on the photoanisotropic response of a new azo-polymer containing sulfonic groups
  • SAKINAH MOHD ALAUDDIN, NURUL FADHILAH KAMALUL ARIPIN, TS VELAYUTHAM, IRAKLI CHAGANAVA, ALFONSO MARTINEZ-FELIPE
    Journal of Photochemistry and Photobiology A: Chemistry
  • Elsevier (ISSN:1010-6030), Volume 389, pages 112268 (15 February 2020); doi: 10.1016/j.jphotochem.2019.112268
     
    Abstract: 

    Abstract:
    We report the preparation of a new light-responsive side-chain terpolymer containing azobenzenes, as chromophoric components, sulfonic groups, as polar components, and methacrylate groups, as film forming components, and we provide a detailed characterisation of its thermal parameters, photoanisotropic character, dielectric response and optoelectronic properties. The poly[(4-methoxyazobenzene-4′-oxy)methacrylate]-co-poly[2-acrylamido-2-methyl-1-propanesulfonic acid]-co-poly[methylmethacrylate], MeOAzB/AMPS/MMA, was prepared by radical copolymerisation, possesses high thermal stability and is amorphous. Its high glass transition [T(g)=151°C] is explained by steric effects (induced by the bulky azobenzenes) and hydrogen bonding (promoted by the polar sulfonic groups) near the polymeric backbone, which may also reduce the photoanisotropic efficiency. The transition between the energy levels of the azobenzenes (MeOAzB) in the terpolymer is controlled by p-type conductivity, and can be associated to motions in the side-chains containing the sulfonic groups (AMPS), which are locally activated below the MeOAzB/AMPS/MMA glass transition.

     

    impact factor
    5.20
      Direct URL (Uniform Resource Locator):
    https://www.sciencedirect.com/science/article/abs/pii/S1010603019313875

 

  • Liquid crystal Pancharatnam-Berry optical elements
  • ZIYUAN ZHOU, YUBING GUO, HAO YU, MIAO JIANG, TARAS TURIV, IRAKLI CHAGANAVA, OLEG D. LAVRENTOVICH, QI-HUO WEI
    Organic Photonics + Electronics. Liquid Crystals XXIII
    SPIE Proceedings (ISSN:0277-786X), Vol. 11092, 0D (29 August 2019); doi: 10.1117/12.2528086
    Editor: Iam Choon Khoo
     
    Abstract: 

    Abstract:
    In this paper, we aim to show that liquid crystal films (LCs) with well-defined molecular orientations are an exceptional platform for flat optical devices based on the Pancharatnam-Berry (PB) phase. Especially, the development of plasmonic photopatterning technique in recent years has made it easy to align liquid crystal molecules in to designer orientation patterns with both high spatial resolution and high throughput and thus enables large scale manufacturing liquid crystal optical devices with low costs. Here we present liquid crystal laser beam shapers and microlenses as two examples to illustrate the design principles and the fabrication processes for liquid crystal flat optical elements. In comparison with flat optical devices made of plasmonic or dielectric metasurfaces, liquid crystal flat optical elements are advantageous due to the high optical efficiencies and low fabrication costs.
    © (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).

     

    impact factor
    1.00
      Direct URL (Uniform Resource Locator):
    https://doi.org/10.1117/12.2528086
  • The resemblance of polarization spectra of polymers between photo- and mechanically- induced microstrains 
  • IRAKLI CHAGANAVA, BARBARA KILOSANIDZE, IRINE KOBULASHVILI
    Optical Manipulation and Structured Materials/SPIE Structured Light
    SPIE Proceedings (ISSN:0277-786X), Vol. 11141, P-18 (21 April 2019); doi: 10.1117/12.2535563
    Editors: Takashige Omatsu, Hajime Ishihara, Keiji Sasaki
     
    Abstract: 

    Abstract:
    The study of the mechanism of the phenomenon of vector polyphotochromism led to the opinion that it has an interference nature. This paper presents the first experimental data on the correspondence of this effect with the manifestation of the photoelasticity of the polymer component of the material. We verified the accordance of the transmission spectra of polarized light on the one hand of a photoactivated polarization-sensitive material and on the other hand under the influence of a mechanical stress. The profiles of the obtained polarization spectra match each other.
    © (2019) COPYRIGHT Optics & Photonics International Congress, Japan (OPIC)

     

     

    impact factor
    1.00
      Direct URL (Uniform Resource Locator):
    https://doi.org/10.1117/12.2535563
  • Controlled placement of microparticles at the water-liquid crystal elastomer interface
  • GRETA BABAKHANOVA, HAO YU, IRAKLI CHAGANAVA, QIHUO WEI, PAUL SHILLER, OLEG D LAVRENTOVICH
    ACS Applied Materials & Interfaces
    American Chemical Society (United States. E-ISSN:1944-8252), 11, 16 (26 March 2019); doi: 10.1021/acsami.8b22023
     
    Abstract: 

    Abstract:
    Controlled placement of microparticles is of prime importance in production of microscale superstructures. In this work we demonstrate the remote control of microparticle placement using a photo-activated surface profile of a liquid crystal elastomer (LCE) coating. We employ light-responsive LCEs with pre-imposed patterns of molecular orientation (director) in the plane of coating. Upon UV illumination, these in-plane director distortions translate into deterministic topographic change of the LCE coating. Microparticles placed at the interface between the LCE coating and water, guided by gravity, gather at the bottom of photoinduced troughs. The effect is reversible: when the substrates are irradiated with a visible light, the coatings become flat and the colloidal arrays disorganize again. The proposed non-contact manipulation of particles by a photo-activated LCEs may be useful in development of drug delivery or tissue engineering applications. © 2019 American Chemical Society,
    United States


     

    impact factor
    13.60
      Direct URL (Uniform Resource Locator):
    https://pubs.acs.org/doi/abs/10.1021/acsami.8b22023
  • Light-inducing birefringence of organic photoanisotropic materials integrated via covalent bonds
  • IRAKLI CHAGANAVA, IRINE KOBULASHVILI, SAKINAH MOHD ALAUDDIN, NURUL FADHILAH KAMALUL ARIPIN, ALFONSO MARTINEZ-FELIPE
    Organic Photonic Materials and Devices XXI
    SPIE Proceedings (ISSN:0277-786X), Vol. 10915, 17 (27 February 2019); doi: 10.1117/12.2506036
    Editors: Christopher E. Tabor; François Kajzar; Toshikuni Kaino
     
    Abstract: 

    Abstract:
    It is known that polarization holography uses photoanisotropic materials to record the state of light polarization. The polarization-holographic method of storage, transformation, transmission and processing of information is one of the most promising directions not only in optical but also in general among information technologies. The potential of increasing sensitivity of certain types of materials to light polarization is not yet fully mastered. In this paper, azodyecontaining photoanisotropic polymers are represented as a result of the study of polarization-sensitive materials, which are distinguished from their predecessors by outstanding photosensitivity. The report shows results of improving the foreground photoanisotropic characteristics, such as: increasing the degree of light-inducible birefringence and the rate of acceleration of this process. Which is the main measuring criterion of photosensitivity and effectiveness of the studied materials. The efficiency of azodye based polarization-sensitive materials is based on integration of their components by forces of electrostatic interactions or covalent bonds. In our previous works we have repeatedly shown clearly all the advantages of the results achieved by the molecular electrostatic integration of the material components. The presented paper shows different advantages of photoanisotropic materials consisting of alternative, covalent bonds, from which the increased velocity of photoanisotrophy and significantly improved magnitude of photosensitivity are worth noting on the first hand. Based on the experiences accumulated as a result of the conducted recent research and the developed recommendations, the new polarization-sensitive materials have deliberately been synthesized and studied.
    © (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE), United States of America

    impact factor
    1.00
      Direct URL (Uniform Resource Locator):
    http://spie.org/Publications/Proceedings/Paper/10.1117/12.2506036
  • Liquid Crystal Pancharatnam–Berry Micro-Optical Elements for Laser Beam Shaping
  • Miao Jiang, Hao Yu, Xiayu Feng, Yubing Guo, Irakli Chaganava, Taras Turiv, Oleg D. Lavrentovich, Qi‐Huo Wei
    Advanced Optical Materials
    Wiley-Blackwell (E-ISSN:2195-1071), Vol. 6, Issue 19 (4 October 2018); doi: 10.1002/adom.201800961
     
    Abstract: 

    Abstract:
    Shaping the intensity profile of a laser beam is desired by various industrial applications. In this paper, a new approach is presented to design and fabricate liquid crystal (LC) micro-optical elements (MOEs) with engineered Pancharatnam–Berry (PB) phases for beam shaping. By generalizing the Snell's law for spatially variant PB phases, molecular orientation patterns are designed for the liquid crystal MOEs to shape a Gaussian laser beam into flattop intensity profiles with circular and square cross-sections, with the β parameter varied from 4 to 42. It is demonstrated that such liquid crystal beam shaping MOEs can be fabricated with high throughput and high resolution by using a photopatterning technique based on plasmonic metamasks and that they produce excellent beam quality, no zero-order light leakage with a beam size from 10 to 600 µm. As the plasmonic metamasks allow for encoding arbitrary molecular orientations, i.e., arbitrary geometric phase profiles, the approaches presented here are widely applicable to large-scale manufacturing of liquid crystal MOEs for any beam shapes. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


     

    impact factor
    10.20
      Direct URL (Uniform Resource Locator):
    https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.201800961
  • Study of the photoanisotropic properties of polarization-sensitive compositions based on organic chromophore salts with various alkali metals
  • IRAKLI CHAGANAVA, ROIN CHEDIA, QI-HUO WEI
    Optical Manufacturing and Testing XII
    SPIE Proceedings (ISSN:0277-786X), Vol. 10742, 1K (14 September 2018); doi: 10.1117/12.2324568
    Editors: Ray Williamson; Dae Wook Kim; Rolf Rascher
     
    Abstract: 

    Abstract:
    According to our studies of polarization-sensitive materials based on azochromophores and polymers in recent years, a factor significantly influencing their photoanisotropic properties has been revealed. The degree of molecular integration of the material components (light-absorbing centers and polymer matrix) is in direct connection with the level of achievable birefringence in media obtained on their basis. This paper considers the results of a study of the integration of polarization-sensitive materials by means of molecular electrostatic forces. Experimental data of the photoanisotropic behavior of optical media based on advisedly designed organic chromophore salts with the participation of almost all alkali metals are shown. Lithium (Li⁺), sodium (Na⁺), potassium (K⁺), cesium (Cs⁺) and hydrogen (H⁺) are used as cations for these polarized light-receiver organic salts, and as an anion, on the other hand, is a residue of functional monoazo dye. The obtained light-absorbing organic salts are doped into the hydrophilic polymer matrix having good lyophilic compatibility. To study the induction of photoanisotropy in the obtained photosensitive materials, we investigate the effect of actinic polarized light on them with wavelengths of 445 nm and 532 nm and variation of reading wavelengths (at 532 nm and 635 nm) depending on the spectral characteristics of the test samples. Optimum parameters of exposure for each composition are determined experimentally. The kinetic curves of the induction of photoanisotropy in the new comparing polarization-sensitive media are shown as light-induced effective photoanisotropy for the various illumination conditions. © (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE), United States of America

    impact factor
    1.00
      Direct URL (Uniform Resource Locator):
    https://spie.org/Publications/Proceedings/Paper/10.1117/12.2324568
  • Induction of the Vector Polyphotochromism in Side-chain Azopolymers
  • IRAKLI CHAGANAVA, BARBARA KILOSANIDZE, GEORGE KAKAURIDZE, LUIS ORIOL, MILAGROS PIÑOL, ALFONSO MARTINEZ-FELIPE
    Journal of Photochemistry and Photobiology A: Chemistry
  • Elsevier (ISSN:1010-6030), Volume 354, pages 70-77 (1 March 2018); doi: 10.1016/j.jphotochem.2017.09.067
     
    Abstract: 

    Abstract:
    The phenomenon of vector photochromism was observed in some high-efficient polarization-sensitive materials depending on the radiant exposure of the inducing linearly polarized actinic light. When radiant exposure exceed certain value specific to each material, a sharp change in the transmission spectrum of the probing linearly polarized nonactinic beam is observed after analyzer. While probing with unpolarized light the transmission spectrum is practically unchanged and does not depend on the magnitude of the radiant exposure. The mechanism of this phenomenon is discussed. The effect is an interference nature and depends on the path difference between the ordinary and extraordinary rays in material with photo-induced anisotropy. It is shown that the kinetics of this effect depends on the photosensitive layer thickness and the concentration of the chromophore.The beams with a wavelength away from the absorption band of the material were used as a probing. It is shown that in this case birefringence has made the main contribution in photoanisotropy. The experiments were carried out for polarization-sensitive materials with varying degrees of components integration, in particular, two synthesized side-chain azopolymers obtained by immobilization of polar azo dyes on polymethylmethacrylate backbone. It is shown that the maximum value of the birefringence Δn = 0.162 achieved in azopolymers with covalently bonded components. In this case a third order of interference of the probing beam is observed.
     

    impact factor
    4.20
      Direct URL (Uniform Resource Locator):
    https://www.sciencedirect.com/science/article/pii/S1010603017302642
  • The study of polyelectrolyte-containing photoanisotropic compositions
  • IRAKLI CHAGANAVA, BARBARA KILOSANIDZE, GEORGE KAKAURIDZE, IRINE KOBULASHVILI
    Light Manipulating Organic Materials and Devices IV
    SPIE Proceedings (ISSN:0277-786X), Vol. 10360, 0L (25 August 2017); doi: 10.1117/12.2274518
    Editors: Manfred Eich; Jean-Michel Nunzi; Jon A. Schuller; Joy E. Haley
  • Abstract: 

    Abstract:
    This paper presents the experiments on photoanisotropic organic media films based on the composition of the azodye and polymer containing different polyelectrolytes. As a part of an experiment to strengthen the cohesion of the matrix macromolecules, we individually added to the test compositions polyelectrolytes with variations of quantity and with the different nature. The kinetic curves of the inducing photoanisotropy in the polarization-sensitive films are shown. The addition of the electrolyte to this type of materials contributes to an early manifestation of vector polyphotochromic effect at low exposures, which in turn is a sign of improved photoanisotropic properties as this effect appears exclusively in high-performance polarization-sensitive materials. © (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).


     

    impact factor
    1.00
      Direct URL (Uniform Resource Locator):
    https://spie.org/Publications/Proceedings/Paper/10.1117/12.2274518
  • Photoanisotropy in Polarization-sensitive Polymer Materials Based on the Media with Covalently-bonded Components
  • IRAKLI CHAGANAVA, BARBARA KILOSANIDZE, GEORGE KAKAURIDZE, LUIS ORIOL, MILAGROS PIÑOL, ALFONSO MARTINEZ-FELIPE
    Organic Photonic Materials and Devices XIX
    SPIE Proceedings (ISSN:0277-786X), Vol. 10101, 0T (2017); doi:10.1117/12.2249997
    Editors: Christopher E. Tabor; François Kajzar; Toshikuni Kaino; Yasuhiro Koike
     
    Abstract: 

    Abstract:
    The well-known scalar photochromism phenomenon is a reversible phototransformation of chemical species between two forms having different absorption spectra. It is observed under the action of actinic light regardless of its polarization state. Unlike this in some high-efficient polarization-sensitive azopolymeric materials, we have observed a welldeveloped vector polyphotochromism which appears as a light-induced area with spectral selectivity for the linearly polarized probing beams. A sharp change in the transmission spectrum of the material have been observed when we placed an irradiated area of the sample between crossed polarizers, while the transmission spectrum of the sample remained practically unchanged in case of probing by unpolarized light. The effect has a purely vector nature, while the transmission spectrum of the exposed material essentially changes in case of observing between crossed polarizers and the change in the spectrum unambiguously depends on the energy exposure. A significant dependence of the kinetic of the vector polyphotochromism induction on the power density of linearly polarized actinic light (445 nm) is shown for probing beam of 635 nm. It is also shown that the kinetics of the effect depends on the photosensitive layer thickness and the concentration of the chromophore. The experiments were carried out for two synthesized side-chain azopolymers obtained as immobilized polar azo dyes on polymethylmethacrylate backbone. It is clearly shown a light-controlled spectral selectivity of the sample activated by the various doses of the stimulating radiation.
    © (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE), United States of America

    impact factor
    1.00
      Direct URL (Uniform Resource Locator):
    https://spie.org/Publications/Proceedings/Paper/10.1117/12.2249997
  • Light Manipulating Vector Polyphotochromatic Behavior in Organic Polarization-sensitive Materials
  • IRAKLI CHAGANAVA, BARBARA KILOSANIDZE, GEORGE KAKAURIDZE
    Light Manipulating Organic Materials and Devices II
    SPIE Proceedings (ISSN:0277-786X), Vol. 9564, 0L (5 September 2015); doi:10.1117/12.2188049
    Editors: Editor: Jon A. Schuller
     
    Abstract: 

    Abstract:
    The phenomenon of vector polyphotochromism within a wide spectral range is revealed in organic polarization-sensitive materials when material is illuminated with linearly polarized actinic light. The effect has a purely vector nature, while the transmission spectrum of the exposed material essentially changes in case of observing between crossed polarizers and the change in the spectrum unambiguously depends on the energy exposure. A significant dependence of the kinetic of the vector polyphotochromism induction on the power density of linearly polarized actinic light (445 nm) is shown for probing beam of 635 nm. It is also shown that the kinetics of the effect depends on the degree of integration of the component molecules of the material by the cohesion of both ways the electrostatic forces (by use mineral electrolytes and polyelectrolytes) and the covalent bonds (azopolymers based on different chromophores), as well as on the photosensitive layer thickness and the concentration of the chromophore. The mechanism of the phenomenon is discussed. Considering the fact that the change in the spectral characteristics occurs throughout the full visible range, this effect may be used for creating the spectrally selective dynamic polarization holographic gratings, displays based on new physical principles, and also for creating modulators and dynamic polarization spectral filters controlled by light.
    © 2015 COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE), United States of America

    impact factor
    0.90
      Direct URL (Uniform Resource Locator):
    http://spie.org/Publications/Proceedings/Paper/10.1117/12.2188049
  • Vector Photochromism in Polarization-sensitive Materials
  • IRAKLI CHAGANAVA, BARBARA KILOSANIDZE, GEORGE KAKAURIDZE, YURI MSHVENIERADZE.
    Optics Letters
    Optical Society of America (ISSN:0146-9592), Vol. 39, Issue 13, pages 3841-3844 (1 July 2014) doi: 10.1364/OL.39.003841
     
    Abstract: 

    Abstract:
    The phenomenon of vector photochromism was observed in some high-efficient polarization-sensitive materials depending on the radiant exposure of the inducing linearly polarized actinic light. The phenomenon has the purely vector nature because the absorption of the irradiated and unirradiated areas of the material is practically identical when we use unpolarized probing light. However, an essential change in the absorption spectrum was observed under probing the sample by linearly polarized nonactinic light when it passes through an analyzer, and this change depends on the value of radiant exposure. The kinetics of the photoanisotropy induced by linearly polarized actinic light at 457 nm was studied in case of wavelengths of 532 and 635 nm of the probing beam. The noticeable difference in absorbance was observed with increase in radiant exposure from 60 J/cm2 up to 250 J/cm2 for the used wavelengths of the probing beam. The experimental results obtained in polarization-sensitive material based on the ammonium salt of the azodye Mordant pure yellow in a gelatin matrix are presented. The dependence of the effective anisotropy on the material thickness has been investigated. The mechanism of the phenomenon is discussed. The observed effect can be used for creating dynamic polarization spectral filters controlled by light and the spectrally selective dynamic polarization holographic gratings. © 2014 Optical Society of America.

    impact factor
    6.60
      Direct URL (Uniform Resource Locator):
    https://www.osapublishing.org/ol/abstract.cfm?uri=ol-39-13-3841
  • Light-Controlled Vector Polyphotochromism
  • IRAKLI CHAGANAVA, BARBARA KILOSANIDZE, GEORGE KAKAURIDZE and YURI MSHVENIERADZE
    Organic Photonics VI
    SPIE Proceedings (ISSN:0277-786X), Vol. 9137, 12 (1 May 2014); doi:10.1117/12.2051756
    Editors: Barry P. Rand; Chihaya Adachi; David Cheyns; Volker van Elsbergen
     
    Abstract: 

    Abstract:
    Phenomenon of vector polyphotochromism was observed in some high-efficient polarization-sensitive materials dependent on the radiant exposure when material was illuminated with linearly polarized actinic light. The phenomenon has purely vector nature, since under probing by unpolarized light, the transmission spectra of the irradiated and unirradiated area of the material are practically identical. However, an essential change in the transmission spectrum of the material was observed by placing the irradiated area between crossed polarizers when the orientation of the axis of induced anisotropy was of 45 degrees relative to the axes of the polarizers. The dispersion of photoanisotropy was studied at different exposure values. Kinetic curves of the photoanisotropy were obtained for wavelength of 532 nm and 635 nm of probing beam for different values of exposure (30, 60 and 250 J/cm2) with linearly polarized actinic light (457 nm). The dispersion curves of the photoanisotropy were obtained for these values of exposure showing an anomalous behavior for exposures above of 30 J/cm2. This phenomenon was observed in specially synthesized organic materials based on azo dyes introduced in a polymer matrix. The difference between optical densities was obtained for polarized light with a wavelength of 532 nm and 635 nm at different exposures, which makes the prospect the dynamic polarization spectral filters controlled by light and the spectrally selective dynamic polarization holographic gratings to be created.
    © 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)

    impact factor
    0.90
      Direct URL (Uniform Resource Locator):
    http://spie.org/Publications/Proceedings/Paper/10.1117/12.2051756
  • Dynamic Polarization Holography: 2. Dynamic Polarization-Holographic Gratings and their Application
  • BARBARA KILOSANIDZE, GEORGE KAKAURIDZE, IRAKLI CHAGANAVA and YURI MSHVENIERADZE
    Applied Optics
    Vol. 52, Issue 5, pp. 1006-1015. (2013) doi:10.1364/AO.52.001006
     
    Abstract: 

    Abstract:
    Dynamic polarization-holographic gratings with a different profile of anisotropy in the band are presented. Polarization-sensitive recording materials of two types are used: material possessing high dark relaxation and highly reversible material without dark relaxation in which the recorded grating is erased by a circularly polarized beam. For a grating recorded by two orthogonally circularly polarized beams a diffraction efficiency of 20% has been obtained at 3.5 W/cm2 power density during 1 ms recording/erasing time. An all-optical cross commutator based on the matrix of dynamic reprogrammable polarization-holographic microholograms is considered. The amplification of the weak beam at two-wave mixing in polarization-sensitive materials has been shown, with an obtained amplification coefficient of 4.95.

     

     

    impact factor
    3.4
      Direct URL (Uniform Resource Locator):
    http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-52-5-1006
  • Development of High-performance, Stable and Moisture-resistant Polarization-sensitive Materials
  • IRAKLI CHAGANAVA, GEORGE KAKAURIDZE, BARBARA KILOSANIDZE and GEORGE DATUKISHVILI
    Optical Manufacturing and Testing IX
    SPIE Proceedings, Vol. 8126, 1I (27 September 2011); doi:10.1117/12.894710
    Editors: James H. Burge; Oliver W. Fähnle; Ray Williamson

     
    Abstract: 

    Abstract:
    New stable polarization-sensitive materials are developed on the hydrophobic components basis which doesn't require an additional moisture protection. Bisazodye ortho-tolidinebisazophenol chromophoric component was synthesized which is liposoluble analogue of water-soluble azodye Mordant Pure Yellow M. This bisazodye were used to develop the hydrophobic materials films which can be applied as a protective layer themselves. To increase the thermal stability we have synthesized material by introducing bisazodye into the main-chain of macromolecule of thermally stable polymer. The different types of polarization-holographic gratings with high diffraction efficiency of 30-50% were recorded on the obtained materials by laser beams (441 - 488 nm).
    © (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

     

    impact factor
    0.80
      Direct URL (Uniform Resource Locator):
    http://spie.org/x648.html?product_id=894710
  • Photoanisotropy in Polarization-sensitive Medium Developed on the Basis of Polar Water-soluble Components
  • IRAKLI CHAGANAVA, GEORGE KAKAURIDZE, BARBARA KILOSANIDZE
    Practical Holography XXV: Materials and Applications
    SPIE Proceedings, Vol. 7957, 14 (7 February 2011); doi:10.1117/12.874744
    Editor: Hans I. Bjelkhagen
     
    Abstract: 

    Abstract:
    In order to obtain a polarization sensitive materials with improved characteristics, there was conducted intensify interaction between the components of recording media through the interaction between the molecular electrostatic forces. For creating materials there were used various organic dyes capable of photochemical geometric isomerization under the influence of actinic polarized light with a wavelength closed to the maximum of the absorption spectrum of each dye. Various polarization sensitive materials have been synthesized based on the polar water-soluble components. Substantial improvement photoanisotropic characteristics of these materials are revealed due to previously added ionizing functional groups in the chromophoric components. It is shown particular exemplary embodiment of synthesis the materials composed of dyes which communicate with certain polymers via dipole-ionic bonds. The research data of medium properties on their base have been brought up for the consideration. In the same way photoanisotropic materials are created on basis of various polar polymer matrixes which separate macromolecules are capable of establishing dipole-dipole bonds with each other. Thanks to this circumstance a supplementary number of polymer fragments which cannot afford direct connection with dye molecules are also able to get drawing into the photoanisotropy inducting processes. It is displayed the influence of such interactions on material kinetics and value of attainable photoanisotropy. A capability of achievement extremely high values of photoanisotropy is produced on the material samples based on the dyes with expanded number of ionized substituent.
    © (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only

    impact factor
    0.80
      Direct URL (Uniform Resource Locator):
    http://spie.org/x648.html?product_id=874744
  • Dynamic Polarization Holography: Methods and Applications
  • B. KILOSANIDZE, G. KAKAURIDZE and I. CHAGANAVA
    Journal of Holography and Speckle
    Volume 5, Number 1, April 2009 , pp. 52-61(10) DOI: 10.1166/jhs.2009.008

     
    Abstract: 

    Abstract:
    The results of investigations of kinetics of photoanisotropy induction and relaxation in polarization-sensitive media with conformation-orientation mechanism of the anisotropy induction and having significant dark relaxation are presented. It is shown that such materials can be applied for tasks of dynamic polarization holography. With the purpose of improvement dynamic characteristics of polarization-sensitive materials azodye Nitrodimethyl red (NDMR) is specially synthesized. Materials on the basis of NDMR are used for recording dynamic polarization-holographic gratings with different profile of anisotropy. The results of the investigation of kinetics of diffraction efficiency (DE) of these gratings and the analysis of polarization state of diffracted orders are given. It is shown that the time of a cycle of recording/erasing for gratings of some types is of the order of 100 ms at DE = 21%. The theoretical model of dynamic polarization-holographic recording on such materials is presented. Possible applications of the methods of dynamic polarization holography are discussed.
    © 2009 American Scientific Publishers. ISSN:1546-900XE-ISSN:1546-9018

    impact factor
    0.18
      Direct URL (Uniform Resource Locator):
    https://doi.org/10.1166/jhs.2009.008
  • Dynamic Polarization Holography: Methods and Applications
  • B. KILOSANIDZE, G. KAKAURIDZE and I. CHAGANAVA
    Holography: Advances and Modern Trends
    SPIE Proceedings 7358, 0S (2009); doi:10.1117/12.821766
    Editors: Miroslav Miler; Miroslav Hrabovský
     
    Abstract: 

    Abstract:
    The results of investigations of kinetics of photoanisotropy induction and relaxation in polarization-sensitive media with conformation-orientation mechanism of the anisotropy induction having significant dark relaxation are presented. It is shown that such materials can be applied for tasks of dynamic polarization holography. With the purpose of improvement dynamic characteristics of polarization-sensitive materials azodye Nitrodimethyl red is specially synthesized. Materials on the basis of NDMR are used for recording dynamic polarization-holographic gratings with different profile of anisotropy. The results of the investigation of kinetics of diffraction efficiency (DE) of these gratings and the analysis of polarization state of diffracted orders are given. It is shown that time of a cycle of recording/erasing for gratings of some types is of the order of 100 ms at DE = 21 %. The theoretical model of dynamic polarizationholographic recording on such materials is presented. Possible applications of the methods of dynamic polarization holography are discussed. © (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).

     

    impact factor
    0.30
      Direct URL (Uniform Resource Locator):
    http://spie.org/x648.html?product_id=821766
  • Dynamic Polarization Holography. 1. Dynamic Polarization-sensitive Materials on the Basis of Azo-dye-containing Polymers
  • B. KILOSANIDZE, G. KAKAURIDZE and I. CHAGANAVA
    Applied Optics
    Vol. 48, Issue 10, pp. 1861-1868 (2009) doi: 10.1364/AO.48.001861
     
    Abstract: 

    Abstract:
    The theoretical and experimental investigation of the kinetics of photoanisotropy induction in polarization-sensitive media with significant dark relaxation on the basis of azo dyes in polymer matrices is considered. For improving dynamic characteristics of polarization-sensitive materials, new azo dye N,N-dimethyl-4((4-nitrophenyl)diazenyl)aniline has been specially synthesized, and the kinetics of photoanisotropy induction and relaxation in materials on the basis of this dye has been compared with materials on the basis of Dimethyl Yellow. It is shown that spectral sensitivity of the material with new azo dye is in the range of 470–520 nm, the working range is both in the visible and in the infrared range (from 520 nm at least up to 3400 nm), the maximum meaning of effective anisotropy is 38% (Δn≈0.022), and the time of photoanisotropy inducing and erasing is approximately 18 ms. It is shown that, if we confine ourselves to meanings of effective anisotropy of approximately 1–2% (Δn≈0.007), the time of inducing/erasing will be of the order of microseconds. The use of such dynamic polarization-sensitive materials gives the possibility of a new direction—dynamic polarization holography to be developed that com bines the possibilities of both dynamic and polarization holography and that opens new prospects for applications.
    © 2009 Optical Society of America
     

    impact factor
    1.92
      Direct URL (Uniform Resource Locator):
    http://www.opticsinfobase.org/abstract.cfm?uri=ao-48-10-1861
  • The Influence of Chemical Activities Polymer Matrices on Photo Anisotropy of Azo dyes
  • VALENTINA SHAVERDOVA, SVETLANA PETROVA, NINO OBOLASHVILI, IRAKLI CHAGANAVA
    Optical Design and Engineering III
    SPIE Proceedings 7100, 1P (2008); doi:10.1117/12.798380
    Editors: Laurent Mazuray; Rolf Wartmann; Andrew Wood; Jean-Luc Tissot; Jeffrey M. Raynor

     
    Abstract: 

    Abstract:
    In this article the results of experimental investigations of photo anisotropy in organic dyes embedded in different polymer matrices are reported. All the matrices used in this work can be subdivided into those entering into a chemical reaction with dye molecules and those that are chemically inactive. The results of this investigation are suggested that the matrix is of crucial importance of the creation of photo anisotropic materials.
    © (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.


     

    impact factor
    0.30
      Direct URL (Uniform Resource Locator):
    http://spie.org/x648.html?product_id=798380
  • Photoinduced Anisotropy in Seleno-cadmium Glass
  • V. TARASASHVILI, A. PURTSELADZE, I. CHAGANAVA
    Optical Design and Engineering III
    SPIE Proceedings SPIE 7100, 22 (2008); doi:10.1117/12.797620
    Editors: Laurent Mazuray; Rolf Wartmann; Andrew Wood; Jean-Luc Tissot; Jeffrey M. Raynor

     
    Abstract: 

    Abstract:
    Anisotropic change of the absorbtion edge of seleno-cadmium glass under the action of linearly polarized monoimpulse of a ruby laser of great power has been investigated. The spectral width of the area of anisotropic bleaching of the sample which is being radiated has been estimated. The dispersion curves of photoinduced birefringence and the anisotropy of the absorbtion on the absorbtion edge of the glass of RY-19 type have been obtained in the interval (6500-6700 Å).
    © (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.


     

    impact factor
    0.30
      Direct URL (Uniform Resource Locator):
    http://spie.org/x648.html?product_id=797620
  • Dynamic Polarization-sensitive Media
  • B. KILOSANIDZE, G. KAKAURIDZE and I. CHAGANAVA
    Optical Memory & Neural Networks
    Volume 16, Number 1, 17-23 (2007) DOI: 10.3103/S1060992X0701002X
     
    Abstract: 

    Abstract:
    The results of investigations of kinetics of photoanisotropy induction and relaxation in polarization-sensitive media with dark relaxation are presented. The model consideration of photoanisotropy in polarization-sensitive media with dark relaxation is presented. The conformation-orientation mechanism of the anisotropy induction in these media is considered. The value of “effective anisotropy” is used for the anisotropy description that allows measurements of photoanisotropy to be made in real-time. The time dependence of the value of photoanisotropy and dark relaxation on the acting radiation intensity and relaxation coefficient is shown. The experimental investigations are carried out on materials on the basis of azodye Dimethyl Yellow introduced into different polymer matrices.
    © 2007 Springer Nature


     

    impact factor
    0.4
      Direct URL (Uniform Resource Locator):
    https://link.springer.com/article/10.3103/S1060992X0701002X
 

 

CONFERENCE THESES
 
  • Control of bacterial dynamics by splay and bend in nematic vortices
    Runa Koizumi, Taras Turiv, Mikhail Genkin, Robert Lastowski, Hao Yu, Irakli Chaganava, Qihuo Wei, Igor Aronson, Oleg Lavrentovich
    Active Matter and Liquid Crystals in Biological Systems I, APS March Meeting 2020 (American Physical Society)
    American Physical Society > Bulletin of the American Physical Society > Active Matter and Liquid Crystals in Biological Systems I > 2020 > P29.00003
    expand.
     

  • Dynamic characteristics of photoanisotropic materials based on biogenic and synthetic polyelectrolytes
    Irakli Chaganava and Irine Kobulashvili
    Frontiers in Optics / Laser Science, Frontiers in Optics 2019
    OSA Publishing > Conference Papers > LS > 2019 > JTu4A
    expand.
     

    • Citation:
      Irakli Chaganava and Irine Kobulashvili

      "Dynamic characteristics of photoanisotropic materials based on biogenic and synthetic polyelectrolytes".
      Frontiers in Optics / Laser Science, Frontiers in Optics 2019
      Conference Paper page JTu4A.27
      Uniform Resource Locator:
    • https://www.osapublishing.org/abstract.cfm?URI=LS-2019-JTu4A.27

  • Alignment and controlled formation of topological defects in living fibroblast cells by liquid crystals
    Taras Turiv, Jess Krieger, Hao Yu, Irakli Chaganava, Qi-Huo Wei, Min-Ho Kim, O D Lavrentovich
    Active Matter III, APS March Meeting 2019 (American Physical Society)
    American Physical Society > Bulletin of the American Physical Society > Active Matter III > 2019 > Volume 64 > Number 2 > F61.00002
    expand.
     

    • Citation:
      Taras Turiv, Jess Krieger, Hao Yu, Irakli Chaganava, Qi-Huo Wei, Min-Ho Kim, O D Lavrentovich
      “Alignment and controlled formation of topological defects in living fibroblast cells by liquid crystals".
      APS March Meeting 2019 (American Physical Society)
      Vol. 64, N2, F61.00002. Bulletin of the American Physical Society.
      Uniform Resource Locator:
    • http://meetings.aps.org/Meeting/MAR19/Session/F61.2
  • Dynamically morphing microchannels in liquid crystal elastomer coatings with extended disclinations
    Robin Selinger, Greta Babakhanova, Youssef Mosaddeghian Golestani, Sajedeh Afghah, Michael Varga, Paul Shiller, Hao Yu, Irakli Chaganava, Jonathan Selinger, Qi-Huo Wei, O Lavrentovich
    Actuation in Soft Matter II, APS March Meeting 2019 (American Physical Society)
    American Physical Society > Bulletin of the American Physical Society > Actuation in Soft Matter II > 2019 > Volume 64 > Number 2 > S59.00009
    expand.
     

    • Citation:
      Robin Selinger, Greta Babakhanova, Youssef Mosaddeghian Golestani, Sajedeh Afghah, Michael Varga, Paul Shiller, Hao Yu, Irakli Chaganava, Jonathan Selinger, Qi-Huo Wei, O Lavrentovich
      “Dynamically morphing microchannels in liquid crystal elastomer coatings with extended disclinations".
      APS March Meeting 2019 (American Physical Society)
      Vol. 64, N2, S59.00009. Bulletin of the American Physical Society.
      Uniform Resource Locator:
    • https://meetings.aps.org/Meeting/MAR19/Session/S59.9

  • Comparative Characteristics of the Properties of Photoanisotropic Materials Composed with Covalent Bond and Electrostatic Interactions
    Irakli Chaganava, Sakinah Mohd Alauddin, Nurul Fadhilah Kamalul Aripin, Alfonso Martinez-Felipe, Irine Kobulashvili
    Frontiers in Optics / Laser Science, Frontiers in Optics 2018
    OSA Publishing > Conference Papers > LS > 2018 > JTu3A > Page JTu3A.21
    expand.
     

    • Citation:
      Irakli Chaganava, Sakinah Mohd Alauddin, Nurul Fadhilah Kamalul Aripin, Alfonso Martinez-Felipe, Irine Kobulashvili

      “Comparative Characteristics of the Properties of Photoanisotropic Materials Composed with Covalent Bond and Electrostatic Interactions".
      Frontiers in Optics / Laser Science, Frontiers in Optics 2018
      Conference Paper page JTu3A.21
      Uniform Resource Locator:
    • https://www.osapublishing.org/abstract.cfm?uri=LS-2018-JTu3A.21

  • The Phenomenon of Vector Polyphotochromism in Polarization-sensitive Materials
    Barbara N. Kilosanidze, Irakli Chaganava, George Kakauridze, Luis Oriol, Milagros Piñol and Alfonso Martinez-Felipe
    Frontiers in Optics: The 100th OSA Annual Meeting and Exhibit/Laser Science XXXII. Polarization Control and Measurements.
    OSA Publishing > Conference Papers > FiO > 2016 > FF3G > Page FF3G.7

    expand.
     

    • Citation:
      Barbara N. Kilosanidze, Irakli Chaganava, George Kakauridze, Luis Oriol, Milagros Piñol and Alfonso Martinez-Felipe
      "The Phenomenon of Vector Polyphotochromism in Polarization-sensitive Materials"
      Celebration of the OSA Centennial. Frontiers in Optics: The 100th OSA Annual Meeting and Exhibit/Laser Science XXXII.
      Conference Paper page FF3G.7
      .
      Uniform Resource Locator:
    • https://www.osapublishing.org/abstract.cfm?uri=FiO-2016-FF3G.7
       

  • Induction of the Vector Polyphotochromism in Side-Chain Azopolymers
    Irakli Chaganava, Barbara Kilosanidze, George Kakauridze, Luis Oriol, Milagros Piñol, Alfonso Martinez-Felipe
    The 4th International Symposium, Molecular Photonics 2016, dedicated to academician A.N. Terenin.
    The meeting is a pre-symposium of the 21-st International Conference on Photochemical Conversion and Storage of Solar Energy (IPS-21)
    Book of Molecular Photonics 2016 Symposium abstracts, p. 34.
    expand.
     

    • Citation:
      Irakli Chaganava, Barbara Kilosanidze, George Kakauridze, Luis Oriol, Milagros Piñol, Alfonso Martinez-Felipe
      “Induction of the Vector Polyphotochromism in Side-Chain Azopolymers".
      The 4th International Symposium, Molecular Photonics 2016, Book of Molecular Photonics 2016 Symposium abstracts, p. 34.
      Uniform Resource Locator:
    • http://terenin.spb.ru/images/files/MPh-2016_Abstr.pdf
    • http://terenin.org
       

  • Spectral Selectivity of Azochromophore-containing Polymer Films in Polarized Light
    Irakli Chaganava, George Kakauridze, Barbara Kilosanidze
    4th International Caucasian Symposium on Polymers and Advanced Materials, symposium abstract, p. 23.
    expand.
     

    • Citation:
      Irakli Chaganava, George Kakauridze, Barbara Kilosanidze

      “Spectral Selectivity of Azochromophore-containing Polymer Films in Polarized Light". ICSP & AM 4
      4th International Caucasian Symposium on Polymers and Advanced Materials. ICSP & AM 2015 symposium abstract, p. 23.
      Uniform Resource Locator:
    • http://www.icsp4.tsu.ge/data/file_db/icsp/ICSP.pdf
       

  • Azodye-Containing Polarization-Sensitive Materials
    I. Chaganava, G. Kakauridze, B. Kilosanidze
    Second International Conference of Young Scientists. Chemistry Today - 2012. ICYS-2012. Abstract book p.20
    expand.
     

  • Photoanisotropic properties enhancement via introducing ionogenic functional groups into the material azodye component molecules
    Irakli Chaganava, George Kakauridze, Barbara Kilosanidze
    2-nd International Conference on Organic Chemistry: "Advances in Heterocyclic Chemistry", GeoHet 2011, Book of Abstracts, PP131, p. 287
    expand.
     


    • Citation:
      Irakli Chaganava, George Kakauridze, Barbara Kilosanidze

      "Photoanisotropic properties enhancement via introducing ionogenic functional groups into the material azodye component molecules", 2-nd International Conference on Organic Chemistry: "Advances in Heterocyclic Chemistry", GeoHet 2011, Book of Abstracts, PP131, p. 287
      Uniform Resource Locator:
    • http://chemistry.ge/conferences/geohet-2011/downloads/GeoHet-2011withCoverpage.pdf
       

  • Polarization-holographic amplifier-corrector of optical signals
    V. Tarasashvili, A. Purtseladze, I. Chaganava
    OSA Technical Digest Series
    Coherent Optical Technologies and Applications 2008 Conference
    expand.
     


    • Citation:
      V.Tarasashvili, A. Purtseladze, I. Chaganava,
      “Polarization-holographic amplifier-corrector of optical signals”,
      in Coherent Optical Technologies and Applications 2008 Conference, OSA Technical Digest Series (Optical Society of America, 2008), paper JMB2.

      Uniform Resource Locator:
    • http://www.opticsinfobase.org/abstract.cfm?URI=COTA-2008-JMB2
       

  • Polarization-holographic gratings and devices on their basis: Polarization-holographic protection system and Polarization-holographic saccharimeter
    Kilosanidze B., Kakauridze G., Mshvenieradze Yu., Chaganava I.
    Technical Programme p.14, Photonics Europe 2008, Conference Exhibition, Photonics Innovation Village.
    expand.
     


    • Citation:
      Kilosanidze B., Kakauridze G., Mshvenieradze Yu., Chaganava I.
      “Polarization-holographic gratings and devices on their basis". Laboratory of Holographic Recording & Processing of Information, Institute of Cybernetics, Georgia.
      Photonics Europe 2008, Photonics Innovation Village, Exhibition Guide p. 8 (Technical Programme p. 14)
      Uniform Resource Locator:
    • http://spie.org/Documents/ConferencesExhibitions/EPE08-Ex-Guide.pdf
       

  • აზოსაღებარების ფოტოქიმიური ქცევები სხვადასხვა პოლიმერულ მატრიცებში
    ვ. შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი, ი. ჩაგანავა
    კონფერენცია "ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 21-24 (2008)
    expand.
     


    • Citation:
      ვ. შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი, ი. ჩაგანავა
      "აზოსაღებარების ფოტოქიმიური ქცევები სხვადასხვა პოლიმერულ მატრიცებში" - კონფერენცია "ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 21-24 (2008)
      Uniform Resource Locator:
    • http://old.rustaveli.org.ge/upload/topic/1288782468.pdf
       
  • დინამიური პოლარიზაციულ-ჰოლოგრაფიული" დიფრაქციული მესრები
    ბ. კილოსანიძე, გ. კაკაურიძე, ი. ჩაგანავა
    კონფერენცია "ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 10-11 (2008)
    expand.
     


    • Citation:
      ვ. შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი, ი. ჩაგანავა
      "აზოსაღებარების ფოტოქიმიური ქცევები სხვადასხვა პოლიმერულ მატრიცებში" - კონფერენცია "ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 10-11 (2008)
      Uniform Resource Locator:
    • http://old.rustaveli.org.ge/upload/topic/1288782468.pdf
       
  • ელიფსომეტრული გაზომვები საღებარი-პოლიმერის ასიმეტრიულ სისტემებში
    ვ. შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი, ი. ჩაგანავა
    კონფერენცია "ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 24-25 (2008)
    expand.
     


    • Citation:
      ვ. შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი, ი. ჩაგანავა
      "აზოსაღებარების ფოტოქიმიური ქცევები სხვადასხვა პოლიმერულ მატრიცებში" - კონფერენცია "ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 24-25 (2008)
      Uniform Resource Locator:
    • http://old.rustaveli.org.ge/upload/topic/1288782468.pdf
       
  • ფოტოინდუცირებული ანიზოტროპია სელენ-კადმიუმიან მინაში და მისი პრაქტიკული გამოყენება
    ვ. ტარასაშვილი, ა. ფურცელაძე, ი. ჩაგანავა,
    კონფერენცია "ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 39-40 (2008)
    expand.
     


    • Citation:
      ვ. შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი, ი. ჩაგანავა
      "აზოსაღებარების ფოტოქიმიური ქცევები სხვადასხვა პოლიმერულ მატრიცებში" - კონფერენცია "ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 39-40 (2008)
      Uniform Resource Locator:
    • http://old.rustaveli.org.ge/upload/topic/1288782468.pdf