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 journalArticlepeer-review


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 languageEnglish
Pages (from-to)337-345
Number of pages9
JournalOptical and Quantum Electronics
Issue number5
Publication statusPublished - 1995 May
Externally publishedYes

ASJC Scopus subject areas

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


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