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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 13 — Jul. 1, 2014
  • pp: 3841–3844

Vector photochromism in polarization-sensitive materials

Irakli Chaganava, George Kakauridze, Barbara Kilosanidze, and Yuri Mshvenieradze  »View Author Affiliations

Optics Letters, Vol. 39, Issue 13, pp. 3841-3844 (2014)

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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 60J/cm2 up to 250J/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

OCIS Codes
(160.1190) Materials : Anisotropic optical materials
(230.5440) Optical devices : Polarization-selective devices
(260.5430) Physical optics : Polarization
(330.6180) Vision, color, and visual optics : Spectral discrimination

ToC Category:
Physical Optics

Original Manuscript: March 24, 2014
Revised Manuscript: May 12, 2014
Manuscript Accepted: May 20, 2014
Published: June 23, 2014

Irakli Chaganava, George Kakauridze, Barbara Kilosanidze, and Yuri Mshvenieradze, "Vector photochromism in polarization-sensitive materials," Opt. Lett. 39, 3841-3844 (2014)

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