光子学报, 2016, 45 (8): 0826001, 网络出版: 2016-09-12
棱镜波导结构的古斯-汉欣位移模拟
Goos-Hnchen Shifts Around the Resonance Angle of a Prism Waveguide Structure
集成光学 表面等离子体共振 古斯-汉欣位移 非线性光学 Integrated optics devices Surface plasmons resonance Goos-Hnchen shifts Nonlinear optics at surfaces
摘要
模拟并分析了波长为633 nm的偏振光通过Kretschmann-Raether微米级棱镜波导结构时的古斯-汉欣位移.在金膜厚度为45 nm的条件下, 当入射角为44.1°时, 利用稳态相位理论, 得到的最大束位移为+120 μm；当入射角为44.1°时, 利用COMSOL Multiphysics5.1软件中的波动光学模块, 得到的最大束位移为+3.37 μm.在共振角附近, COMSOL Multiphysics5.1模拟软件与稳态相位理论均得到正的古斯-汉欣位移, 但是COMSOL Multiphysics5.1软件模拟的结果远小于稳态相位理论仿真的结果.该研究对设计基于古斯-汉欣位移测量的高灵敏度传感器具有指导意义.
Abstract
Goos-Hnchen (GH) shifts of 633 nm polarized light through a μm-order isosceles triangle prism waveguide structure with Kretschmann-Raether configuration were simulated and analyzed. When the thickness of gold film is 45 nm, the maximum positive beam displacement, obtained using a Stationary-Phase Analysis (SPA), is about +120 μm at the incident angle of 44.1°; and it is +3.37 μm using COMSOL Multiphysics5.1 (CM) at the incident angle of 44.1°. The beam displacements, obtained using CM and SPA around the resonance angle, are all positive, although the enhancement effect from CM is much less than that of SPA. These results are useful for designing high sensitivity sensors based on GH shift measurement.
张文静, 张志伟, 杨鹏, 朱祥, 戴一帆, 魏玉芸. 棱镜波导结构的古斯-汉欣位移模拟[J]. 光子学报, 2016, 45(8): 0826001. ZHANG Wen-jing, ZHANG Zhi-wei, YANG Peng, ZHU Xiang, DAI Yi-fan, WEI Yu-yun. Goos-Hnchen Shifts Around the Resonance Angle of a Prism Waveguide Structure[J]. ACTA PHOTONICA SINICA, 2016, 45(8): 0826001.
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