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Proceedings Paper

Azobenzene liquid crystals for fast reversible optical switching and enhanced sensitivity for visible wavelengths
Author(s): Uladzimir Hrozhyk; Svetlana Serak; Nelson Tabiryan; Diane M. Steeves; Landa Hoke; Brian R. Kimball
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Paper Abstract

We study optical switching properties of novel azobenzene liquid crystal (azo LC) material systems based on mesogenic azo dyes distinguished by enhanced absorption in the visible spectrum and a short lifetime of the photoexcited state. Due to their mesogenic nature these azo dyes can be doped at high concentrations in room temperature LCs. This permits one to obtain results using low energy density values required for observation of strong nonlinear optical processes and short spontaneous restoration times of their original state. A photoinduced nematic-isotropic phase transition could be induced with a single nanosecond pulse. Thin material layers of the order of radiation wavelength were used in the study.

Paper Details

Date Published: 20 August 2009
PDF: 15 pages
Proc. SPIE 7414, Liquid Crystals XIII, 74140L (20 August 2009); doi: 10.1117/12.827067
Show Author Affiliations
Uladzimir Hrozhyk, BEAM Engineering for Advanced Measurements Co. (United States)
Svetlana Serak, BEAM Engineering for Advanced Measurements Co. (United States)
Nelson Tabiryan, BEAM Engineering for Advanced Measurements Co. (United States)
Diane M. Steeves, U.S. Army Soldier Systems Ctr. (United States)
Landa Hoke, U.S. Army Soldier Systems Ctr. (United States)
Brian R. Kimball, U.S. Army Soldier Systems Ctr. (United States)


Published in SPIE Proceedings Vol. 7414:
Liquid Crystals XIII
Iam Choon Khoo, Editor(s)

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