Optical reorientation in nematic liquid crystals controlled by the laser beam shape

被引：10
|
作者：
Marrucci, L [1 ]
Vetrano, F [1 ]
Santamato, E [1 ]
机构：
[1] Univ Naples Federico II, Ist Nazl Fis Mat, Dipartimento Sci Fis, I-80126 Naples, Italy
来源：
OPTICS COMMUNICATIONS | 1999年 / 171卷 / 1-3期
关键词：
optics of liquid crystals; optical Freedericksz transition;
D O I：
10.1016/S0030-4018(99)00526-X
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate experimentally that the transverse shape of the laser beam can strongly affect the laser-induced molecular reorientation in nematic liquid crystals. In this paper we studied only the case of elliptical beam cross-section. In this case, a relatively strong extra-torque was observed tending to reorient the liquid crystal director parallel to the ellipse major axis. The extra-torque is zero for circular beam cross-section and increases as the beam cross-section becomes more and more elliptical. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码：131 / 136
页数：6
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