Abstract

The observation of double peaks of diffraction efficiency through the degenerate four-wave mixing process as a function of the biasing electric-field strength in a nematic liquid-crystal film is described. This behavior is due to the high optical nonlinearity of liquid-crystal media and the dramatic modulating effect of an ac voltage on the reorientational Freedericksz transition. The dependence of the peak occurrence on grating periods, electric fields, and optical intensities is presented. Theoretical calculations show the same characteristic behavior as do the experimental results.

© 1990 Optical Society of America

Quasi-static electric-field-enhanced degenerate four-wave mixing in a nematic liquid-crystal film

Shu-Hsia Chen, C.-L. Kuo, and Ming-Chih Lee
Opt. Lett. 14(2) 122-124 (1989)

Unique behavior of thickness dependence in the nonlinear wave-mixing process with a nematic thin film

Chen-Lung Kuo, J.-G. Wei, and Shu-Hsia Chen
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Optical phase conjugation in a nematic liquid-crystal film modulated by a quasi-static electric field

Shu-Hsia Chen and Yuhren Shen
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Quasi-static electric-field-enhanced diffraction effects in a nematic liquid-crystal film

Shu-Hsia Chen, Ci-Ling Pan, Y.-M. Chen, and H.-H. Liao
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Propagation of a Gaussian-profile laser beam in nematic liquid crystals and the structure of its nonlinear diffraction rings

J. J. Wu, Shu-Hsia Chen, J. Y. Fan, and G. S. Ong
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