Title

Fast-response infrared ferroelectric liquid crystal phase modulators

Authors

Authors

J. H. Lee; Y. H. Wu; S. T. Wu; D. W. Kim; C. J. Yu;S. D. Lee

Comments

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Abbreviated Journal Title

Mol. Cryst. Liquid Cryst.

Keywords

alignment breaking effect; ferroelectric liquid crystal; IR application; phase modulation; vertical alignment; Crystallography

Abstract

A high speed phase modulator based on ferroelectric liquid crystal (FLC) is demonstrated. For uniform alignment and pure phase modulation, we propose a new FLC device using a short helical pitch material in a homeotropic alignment. This device is driven by periodic in-plane electrode stripes implemented on the surface of both cell substrates. As a result, we have obtained a large phase modulation (about 2.3 pi at lambda = 1.55 mu m under E = 2.5 V/mu m) and fast response time (< 200 mu sec). Together with the performance characterization of our device, we discuss the alignment breaking effect which occurs near the edges of operating region.

Journal Title

Molecular Crystals and Liquid Crystals

Volume

453

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

343

Last Page

354

WOS Identifier

WOS:000238449700027

ISSN

1542-1406

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