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Proceedings Paper

A polarization-independent liquid crystal phase modulation using polymer-network liquid crystal with orthogonal alignment layers
Author(s): Ming-Syuan Chen; Wei-Chih Lin; Yu-Shih Tsou; Yi-Hsin Lin
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Paper Abstract

A polarization-independent liquid crystal (LC) phase modulation using polymer-network liquid crystals with orthogonal alignments layers (T-PNLC) is demonstrated. T-PNLC consists of three layers. LC directors in the two layers near glass substrates are orthogonal to each other. In the middle layer, LC directors are perpendicular to the glass substrate. The advantages of such T-PNLC include polarizer-free, larger phase shift (~0.4π rad) than the residual phase type (<0.05π rad), and low operating voltage (< 30Vrms). It does not require bias voltage for avoiding scattering because the refractive index of liquid crystals matches that of polymers. The phase shift of T-PNLC is affected by the cell gap and the curing voltages. The potential applications are laser beam steering, spatial light modulators and electrically tunable micro-lens arrays.

Paper Details

Date Published: 11 October 2012
PDF: 8 pages
Proc. SPIE 8475, Liquid Crystals XVI, 84750S (11 October 2012); doi: 10.1117/12.930845
Show Author Affiliations
Ming-Syuan Chen, National Chiao Tung Univ. (Taiwan)
Wei-Chih Lin, National Chiao Tung Univ. (Taiwan)
Yu-Shih Tsou, National Chiao Tung Univ. (Taiwan)
Yi-Hsin Lin, National Chiao Tung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 8475:
Liquid Crystals XVI
Iam Choon Khoo, Editor(s)

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