NONLINEAR-OPTICAL PROCESSES IN NEMATIC LIQUID-CRYSTALS NEAR FREDERICKS TRANSITIONS

被引:94
作者
HERMAN, RM
SERINKO, RJ
机构
[1] Department of Physics, Pennsylvania State University, University Park
来源
PHYSICAL REVIEW A | 1979年 / 19卷 / 04期
关键词
D O I
10.1103/PhysRevA.19.1757
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Weak-beam amplification and diffracted-beam production are predicted under a variety of conditions, in which thin nematic-liquid-crystal samples maintained in an external magnetic field near Freedericks transitions are simultaneously illuminated by strong and weak beams derived from the same light source. It is shown that for 4-methoxybenzylidene-4-butylaniline, substantial weak-beam amplification should occur under continuous illumination for modest ( 0.1 W/cm2) strong-beam intensities, for certain cell and beam geometries. If a small positive frequency difference between the strong and weak incident beams is maintained, weak-beam amplification is further enhanced, and the conditions on the angles of incidence for amplification are considerably relaxed. © 1979 The American Physical Society.
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页码:1757 / 1769
页数:13
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