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

页码：131 / 136

页数：6

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