Determination Of The 2 1St Nontrivial Orientational Order Parameters In Lb Films Of Rod-Like Molecules By 3Rd-Order Sum Frequency Mixing

    Authors

    M. Cha; D. Neher; F. W. Embs; S. Mittlerneher;G. Stegeman

    Comments

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    Abbreviated Journal Title

    Chem. Phys. Lett.

    Keywords

    Nonlinear Optical Susceptibilities; 3Rd-Harmonic Generation; Liquid-Crystal; Chemistry, Physical; Physics, Atomic, Molecular & Chemical

    Abstract

    We demonstrate a new method for investigating orientational order in Langmuir-Blodgett films built from rod-like poly[bis(m-butoxyphenyl)silane] molecules. Two laser beams with different input frequencies omega1 and omega2 were collinearly overlapped to generate mixed light at the frequency 2omega1 + omega2 using all possible permutations of the beam polarizations. From the independent tensor components of chi(3)(-omega3; omega1, omega1, omega2) the first non-trivial in-plane order parameters C2 and C4 could be deduced with high accuracy. The orientational order could be well described by a two-dimensional diffusion model.

    Journal Title

    Chemical Physics Letters

    Volume

    202

    Issue/Number

    1-2

    Publication Date

    1-1-1993

    Document Type

    Article

    Language

    English

    First Page

    44

    Last Page

    50

    WOS Identifier

    WOS:A1993KH00800008

    ISSN

    0009-2614

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