Title

Phase-only modulation using a normal-mode liquid-crystal gel

Authors

Authors

H. W. Ren; J. R. Wu;S. T. Wu

Comments

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Abbreviated Journal Title

J. Appl. Phys.

Keywords

LIGHT MODULATORS; ANISOTROPIC GELS; SCATTERING; GRATINGS; Physics, Applied

Abstract

A normal-mode liquid-crystal (LC) gel for phase-only modulation is demonstrated. In the absence of an electric field, the gel has negligible light scattering. Upon application of an electric field, the gel becomes highly transparent and exhibits phase modulation capability. For a 20-mu m transmissive E48 LC gel, the phase shift reaches 0.55 pi at lambda=633 nm and the response time is similar to 2 ms. Although the phase change is not very large, it is sufficient for making adaptive microphotonic devices. Such a normal-mode LC gel-based phase modulator is free from scattering and hysteresis and has a fast response time and good long-term operation stability. (c) American Institute of Physics.

Journal Title

Journal of Applied Physics

Volume

98

Issue/Number

2

Publication Date

1-1-2005

Document Type

Article

Language

English

First Page

4

WOS Identifier

WOS:000230931500004

ISSN

0021-8979

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