Title

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

Title - Alternative

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.

Publication 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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