Electric control of spatial beam position based on the Goos–Hänchen effect

Yi Wang; Zhuangqi Cao; Honggen Li; Jun Hao; Tianyi Yu; Qishun Shen
September 2008
Applied Physics Letters;9/1/2008, Vol. 93 Issue 9, p091103
Academic Journal
A structure of symmetrical metal-cladding waveguide, which contains optically nonlinear material in the guiding layer, is proposed to control the lateral shift of the reflected beam via an external electric field. Owing to the high sensitivity of ultrahigh-order modes, any minute index change of the waveguide will lead to a dramatic variation of the resonance condition, which gives rise to a change of the lateral beam displacement. Experimental result shows that the electric control of the lateral beam shift is realized in a range of 720 μm.


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