ENHANCEMENT OF OPTICAL NONLINEARITY IN A QUEST HOST SYSTEM BY NEMATIC ORDERING

Authors
PARK, BEOM, SYLEE, SDCHOI, DHPARK, SYKIM, N
Issue Date
1995-05
Publisher
CHAPMAN HALL LTD
Citation
OPTICAL AND QUANTUM ELECTRONICS, v.27, no.5, pp.337 - 345
Abstract
Second-harmonic generation (SHG) has been studied for understanding the enhancement mechanism for the second-order optical nonlinearity by the nematic (or axial) ordering in a liquid crystal doped with one-dimensional nonlinear optical (NLO) organic molecules. An extended version of the Maier-Saupe mean-field theory for nematic liquid crystals was developed to obtain analytical expressions for the second-order NLO coefficients in terms of the axial order, the polar order and the effective nematic potential. From the SHG data in a guest-host system composed of N,N'-dimethylaminonitrostilbene molecules (0.5% by weight) and a liquid crystal, the enhancement of the second-order NLO coefficient, d33, by nematic ordering becomes almost 3, which agrees well with our theoretical predictions.
Keywords
POLED POLYMER-FILMS; 2ND-HARMONIC GENERATION; POLED POLYMER-FILMS; 2ND-HARMONIC GENERATION
ISSN
0306-8919
URI
https://pubs.kist.re.kr/handle/201004/145083
DOI
10.1007/BF00563568
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KIST Article > Others
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