Enhancement of optical nonlinearity in a guest-host system by nematic ordering

Byoungchoo Park; Sang Young Eom; Sin Doo Lee; Dong Hoon Choi; Soo Young Park; Nakjoong Kim

doi:10.1007/BF00563568

Enhancement of optical nonlinearity in a guest-host system by nematic ordering

Byoungchoo Park, Sang Young Eom, Sin Doo Lee, Dong Hoon Choi, Soo Young Park, Nakjoong Kim

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	337-345
Number of pages	9
Journal	Optical and Quantum Electronics
Volume	27
Issue number	5
DOIs	https://doi.org/10.1007/BF00563568
Publication status	Published - 1995 May
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1007/BF00563568

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title = "Enhancement of optical nonlinearity in a guest-host system by nematic ordering",

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.",

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AU - Park, Byoungchoo

AU - Eom, Sang Young

AU - Lee, Sin Doo

AU - Choi, Dong Hoon

AU - Park, Soo Young

AU - Kim, Nakjoong

PY - 1995/5

Y1 - 1995/5

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Enhancement of optical nonlinearity in a guest-host system by nematic ordering

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