Physical origin of large positive and negative lateral optical beam shifts in prism-waveguide coupling system

被引:15
作者
Liu, Xiangmin [1 ]
Yang, Qingfen [1 ]
Qiao, Zhi [1 ]
Li, Tongkai [1 ]
Zhu, Pengfei [2 ]
Cao, Zhuangqi [2 ]
机构
[1] Shijiazhuang Railway Inst, Dept Math & Phys, Shijiazhuang 050043, Peoples R China
[2] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China
关键词
Total reflection; Goos-Hanchen shift; Prism-waveguide coupling system; GOOS-HANCHEN SHIFT; REFLECTION; DISPLACEMENT; RESONANCE;
D O I
10.1016/j.optcom.2010.03.002
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Large lateral beam shift in prism-waveguide coupling system is theoretically analyzed from the viewpoint of interference between multiple reflected beam constituents. It is shown that the reflected beam is a result of interference between two beams: the beam directly reflected from the prism and the total leaky beam coming from guided mode. The thickness of coupling layer determines the amplitude of the total leaky beam, and further determines the sign (positive or negative) of the reflected beam shift. Because of interference between two beams, intrinsic damping itself plays an important role in deciding the distortion of the reflected beam. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:2681 / 2685
页数:5
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