Low loss liquid crystals for infrared applications

    Authors

    F. L. Peng; Y. Chen; S. T. Wu; S. Tripathi;R. J. Twieg

    Comments

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    Abbreviated Journal Title

    Liq. Cryst.

    Keywords

    mid-wave infrared; liquid crystal; low absorption; PHASE-SHIFTER; DISPLAYS; Chemistry, Multidisciplinary; Crystallography; Materials Science, ; Multidisciplinary

    Abstract

    Seven fluorinated and chlorinated terphenyl compounds intended for mid-wave infrared (MWIR) applications are synthesised and two eutectic mixtures formulated, and their physical properties evaluated. In addition to low absorption, some desirable properties for MWIR applications include wide nematic range, high birefringence, large dielectric anisotropy and low viscosity. The fluorinated terphenyl mixture exhibits a relatively low absorption in the vicinities of lambda~3 mu m, but a fairly strong overtone appears in the 4-5 mu m region. To suppress these overtone absorptions, short-chain chlorinated terphenyl compounds are proven to be useful.

    Journal Title

    Liquid Crystals

    Volume

    41

    Issue/Number

    11

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    1545

    Last Page

    1552

    WOS Identifier

    WOS:000344456600006

    ISSN

    0267-8292

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