Sub-millisecond response phase modulator using a low crossover frequency dual-frequency liquid crystal

    Authors

    H. Q. Xianyu; S. Gauza;S. T. Wu

    Comments

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    Abbreviated Journal Title

    Liq. Cryst.

    Keywords

    dual-frequency liquid crystal; fast response; phase modulator; dielectric relaxation; HIGH-BIREFRINGENCE; TIME; TEMPERATURE; Chemistry, Multidisciplinary; Crystallography; Materials Science, ; Multidisciplinary

    Abstract

    A high birefringence (n=0.292 at =633nm, 25C) and low crossover frequency (1kHz at T=25C) dual-frequency liquid crystal (DFLC) mixture was developed. The high birefringence enabled us to use a thin liquid crystal cell, which is helpful for fast response time and low operating voltage. The initially low crossover frequency allowed us to operate the DFLC device at an elevated temperature, which significantly lowers the viscosity while keeping the crossover frequency in an acceptable range (10kHz). We demonstrated a 2 phase shifter at =633nm using such a DFLC and obtained a sub-millisecond response time at T45C. This type of DFLC mixture together with elevated temperature operation opens a new way for achieving fast response time.

    Journal Title

    Liquid Crystals

    Volume

    35

    Issue/Number

    12

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    1409

    Last Page

    1413

    WOS Identifier

    WOS:000261739300010

    ISSN

    0267-8292

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