Nonlinear optical amplification in a nematic liquid crystal above the Frederiks transition

Iam-choon Khoo, Shu Lu Zhuang

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Abstract

We have observed a new nonlinear light amplification process in a nematic liquid crystal, p-methoxybenzylidene-p-n-butylaniline, maintained above the Frederiks transition by a magnetic field. Substantial probe-beam gain (10% or more) was observed for a moderate same-frequency pump beam of intensity on the order of W/cm2, and is attributed to the molecular anisotropy associated with the director axis reorientation. The observed gain and nonlinear intensity dependence are in excellent quantitative agreement with theoretical predictions. An analogous effect is also observed for the case when the Fredericks transition is caused by a dc electric field.

Original languageEnglish (US)
Pages (from-to)3-4
Number of pages2
JournalApplied Physics Letters
Volume37
Issue number1
DOIs
StatePublished - Dec 1 1980

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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