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A Molecular Dynamics Simulation Study of the Nonlinear Optical Response of Liquid Crystalline Systems

Published online by Cambridge University Press:  15 March 2011

Kenji Kiyohara ,
Koji Ohta  and
Yo Shimizu
Kenji Kiyohara
Affiliation:
Special Division for Human Life Technology and National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan Research Institute for Computational Sciences, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
Koji Ohta
Affiliation:
Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
Yo Shimizu
Affiliation:
Special Division for Human Life Technology and National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
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Abstract

We investigated the third-order nonlinear optical response of a Gay-Berne system at the isotropic, nematic, and smectic phases by molecular dynamics simulation. The components of the optical response were calculated for the three different axes with respect to the director of the system, separately. In the nematic phase, in particular, we observed that the response function does not vanish at long times. This means that the orientation of the director of the system is permanently changed by an instant irradiation of polarized light, as a result of third-order nonlinear optical response. In the smectic phase, however, all the components of the response function decay quickly. Our results give a theoretical background at molecular level on the interpretation of the reported experimental observations of peculiar dynamics of liquid crystalline systems at irradiation of laser lights.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 709: Symposium CC – Advances in Liquid Crystalline Materials and Technologies , 2001 , CC5.13.1
Copyright
Copyright © Materials Research Society 2002

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