Electric control of spatial beam position based on the Goos–Hänchen effect
Electric control of spatial beam position based on the Goos–Hänchen effect
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DOI：
10.1063/1.2977873
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发表时间：
2008-09
影响因子：
4
通讯作者：
Yi Wang;Z. Cao;Honggen Li;J. Hao;Tianyi Yu;Q. Shen
中科院分区：
文献类型：
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作者：
Yi Wang;Z. Cao;Honggen Li;J. Hao;Tianyi Yu;Q. Shen
提出了一种对称金属包层波导结构，在波导层中加入光学非线性材料，通过外加电场控制反射光束的横向位移。由于超高阶模的高灵敏度，波导的任何微小的折射率变化都会引起共振条件的剧烈变化，从而引起横向光束位移的变化。实验结果表明，在720μm范围内实现了横向光束位移的电控控制。
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 720μm.