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Proceedings Paper

Liquid Crystal Orientational Distribution Functions And Third Harmonic Generation
Author(s): K Y Wong; A F Garito
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Paper Abstract

Long range orientational order in a nematic liquid crystal phase is described by the orientation distribution function in the form of ascending Legendre functions <Pn> of even order n that are experimentally determined by measurements of the tensor components of a corresponding nth rank tensor physical property. We report new formalism and experimental results that demonstrate relationships between <P2>, <P4> and the third harmonic suscepti-bility of liquid crystal phases. The experimental system studied i 3) Oe well-known nematic liquid crystal MBBA. The microscopic third order response )0(-3w;w,w,w) of aligned MBBA samples was determined by third harmonic generation using t'Oe,Maker fringe wedge method. The measured polarization and temperature dependence of x°) are in good agreement with theory and with independent results from separate experimental studies of <P2> and <P4>.

Paper Details

Date Published: 28 January 1987
PDF: 9 pages
Proc. SPIE 0682, Molecular and Polymeric Optoelectronic Materials, (28 January 1987); doi: 10.1117/12.939652
Show Author Affiliations
K Y Wong, University of Pennsylvania (United States)
A F Garito, University of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 0682:
Molecular and Polymeric Optoelectronic Materials
Garo Khanarian, Editor(s)

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