Low aspect ratio transverse optical patterns in dye-doped nematic liquid crystals

被引：7
|
作者：
Macdonald, R [1 ]
Damerau, U [1 ]
Danlewski, H [1 ]
机构：
[1] Tech Univ Berlin, Inst Opt, D-10623 Berlin, Germany
来源：
CHAOS SOLITONS & FRACTALS | 1999年 / 10卷 / 4-5期
关键词：
D O I：
10.1016/S0960-0779(98)00012-5
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
Spontaneous transverse two-dimensional optical pattern formation has been observed with dye-doped nematic liquid crystals in front of a single feedback mirror. It is shown that photo-thermally excited dispersive optical nonlinearities are responsible for the observed spatial instabilities. The appearence and symmetry of the patterns obtained within finite diameter laser beams in low aspect ratio regimes are discussed in terms of Bessel function modes. Furthermore, a comparision of self-focussing versus self-defocussing nonlinearities has been performed by using ordinary or extra-ordinary polarized input beams. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：651 / 660
页数：10
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