Development of high-performance, stable, and moisture-resistant polarization-sensitive materials

Chaganava, Irakli; Kakauridze, George; Kilosanidze, Barbara; Datukishvili, George

doi:10.1117/12.894710

Cited by 5 publications

(3 citation statements)

References 9 publications

(18 reference statements)

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“…It is known that in conventional polarization-sensitive materials photoanisotropy is induced under the action of actinic polarized light. It reaches its maximum and then remains unchanged even after long exposure, remaining at a level of saturation, during which there is the maximum transmission of the probe beam ( Figure 1, curve 1) [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Induction of the vector polyphotochromism in side-chain azopolymers

Chaganava

Kilosanidze

Kakauridze

et al. 2018

Journal of Photochemistry and Photobiology A: Chemistry

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Highlights  We found the effect of photoinduced changes in the spectral properties of the material within the entire visible range.  The further investigation of this vector polyphotochromic effect is presented.  Phenomenon is related to the photoelastic interference quenching of probing beams.  We prove the relationship between the chemical composition and material optical properties.

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Section: Introductionmentioning

confidence: 99%

Induction of the vector polyphotochromism in side-chain azopolymers

Chaganava

Kilosanidze

Kakauridze

et al. 2018

Journal of Photochemistry and Photobiology A: Chemistry

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“…It reaches its maximum and then remains unchanged even after long exposure, remaining at a level of saturation, during which there is the maximum transmission of the probe beam ( Figure 1, curve 1). [4][5][6][7][8][9][10] Unlike this in some high-efficient polarization-sensitive materials obtained by us, we have observed the anomalous kinetics of photoanisotropy induction after reaching its maximum value when material is exposed by actinic linearly polarized radiation and simultaneously is probed by monochromatic nonactinic linearly polarized light beam. [11][12][13] After reaching the maximum the intensity of the transmitted probing beam starts decreasing with radiant exposure of inducing light increasing and almost reaches zero for the given wavelength of the probing beam ( Figure 1, curve 2).…”

Section: Introductionmentioning

confidence: 72%

Photoanisotropy in polarization-sensitive polymer materials based on the media with covalently-bonded components

et al. 2017

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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.

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“…The recording materials used by us are stable and due to this fact information recording on such materials is kept for a long time (some years and more). 16,17 In the process of diffraction, such an element decomposes light incoming on them onto orthogonal circular and linear basis. As a result, the element forms 3 beams in +1st and 3 beams in -1st orders of diffraction: two orthogonal circularly polarized beams with intensities C I + , C I − , two linearly polarized beam 45 I with an azimuth +45 0 with equal intensities and two linearly polarized beams 90 I with an azimuth +90 0 with equal intensities, and also nondiffracted beam with a state of polarization identical to incoming beam by the polarization state.…”

Section: Theoretical Modelmentioning

confidence: 99%

A new real-time polarimetric method for determining the distribution of stressed state in different constructions

Kakauridze

Kilosanidze

Kvernadze

et al. 2015

Photonic Instrumentation Engineering II

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A new real-time nondestructive polarimetric method is suggested for the determination of the stressed state distribution in different objects. Light reflected from the object is polarized in a varying degree, and the distribution of the polarization state in the object image is related to the distribution of stresses in it. Method is based on the obtaining the distribution pattern of the polarization state of light in the object image, which is formed by an objective. The integral polarization-holographic diffraction element developed by us is used for real time complete analysis of the polarization state of light at each point of the image, formed by the element in the diffraction orders. The simultaneous measurement of the intensities in four diffracted beams by means of a matrix of photodetectors and the appropriate software enable the polarization state of an analyzable light and its change to be obtained in real time. The laboratory model is presented. The correlation relations between the polarization state of light reflected from the sample with the distribution of the dosated mechanical stresses is considered. The theoretical model is presented. The experimental results are shown for different samples with one-and two-axis stress distribution. The method is nondestructive, i.e. there is no need to drill holes or openings or sticking transparent photoelastic plates on the object to determine the stresses. This method will enable the distance monitoring and diagnosis of already existing constructions to be carried out. This method will differ by universality, simplicity, high speed and comparative cheapness.

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Development of high-performance, stable, and moisture-resistant polarization-sensitive materials

Cited by 5 publications

References 9 publications

Induction of the vector polyphotochromism in side-chain azopolymers

Induction of the vector polyphotochromism in side-chain azopolymers

Photoanisotropy in polarization-sensitive polymer materials based on the media with covalently-bonded components

A new real-time polarimetric method for determining the distribution of stressed state in different constructions

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