Surface-induced nonlinearities of liquid crystals driven by an electric field

被引：30
|
作者：
Lucchetti, L. [1 ,2 ]
Gentili, M. [1 ,2 ]
Simoni, F. [1 ,2 ]
Pavliuchenko, S. [3 ]
Subota, S. [3 ]
Reshetnyak, V. [3 ]
机构：
[1] Univ Politecn Marche, Dipartimento Fis & Ingn Mat & Territorio, I-60131 Ancona, Italy
[2] Univ Politecn Marche, CNISM, I-60131 Ancona, Italy
[3] Kyiv Natl Taras Shevchenko Univ, Fac Phys, UA-03022 Kiev, Ukraine
来源：
PHYSICAL REVIEW E | 2008年 / 78卷 / 06期
关键词：
birefringence; electric field effects; liquid theory; nematic liquid crystals; optical materials; organic compounds; refractive index; self-phase modulation;
D O I：
10.1103/PhysRevE.78.061706
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We report the study of the effect of a static electric field on the huge optical nonlinearity of methyl-red doped nematic liquid crystals. Experimental data are well fitted using a theoretical model that takes into account the modulation of the surface charge density due to the impinging light beam. It is demonstrated that the optical nonlinearity can be varied by orders of magnitude with application of a low voltage below the threshold of the Fredericks transition. These results confirm the previously proposed model of surface induced nonlinear effects.
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页数：8
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