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Opto-Electronics Review

Editor-in-Chief: Jaroszewicz, Leszek

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Volume 17, Issue 4 (Dec 2009)


Light-controlled helical pitch and dynamic gratings

V. Boychuk
  • Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, Kiev, 03039, Ukraine
  • Email:
/ I. Gerus
  • Institute of Bioorganic and Petro-chemistry, National Academy of Sciences of Ukraine, 1 Murmanskaya Str., Kiev, 04660, Ukraine
  • Email:
/ A. Iljin
  • Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, Kiev, 03039, Ukraine
  • Email:
/ J. Parka
  • Institute of Applied Physics, Military University of Technology, 2 Kaliskiego Str., Warsaw, 00-908, Poland
  • Email:
Published Online: 2009-10-23 | DOI: https://doi.org/10.2478/s11772-009-0009-8


A chiral nematic liquid crystal (LC) with a photo-sensitive chiral agent is employed for a light-controlled modulation of optical activity and used as a model substance for a dynamic diffraction grating recording. The described liquid crystalline system has shown a strong nonlinear response with effective parameter of cubic nonlinearity being much greater of that characteristic of the orientational nonlinearity of LC. A simple mathematical model of light diffraction on the grating of modulated optical activity was developed. Calculated values of intensities and polarisation states of diffracting beams have shown very good agreement with the experimental data. LC systems with light-controlled chirality could be promising media for nonlinear optical applications or all-optical switching devices.

Keywords: chiral nematics; optical activity; diffraction grating; photonic bandgap

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About the article

Published Online: 2009-10-23

Published in Print: 2009-12-01

Citation Information: Opto-Electronics Review, ISSN (Online) 1896-3757, DOI: https://doi.org/10.2478/s11772-009-0009-8. Export Citation

© 2009 SEP, Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. (CC BY-NC-ND 3.0)

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