矩形hBN层状光栅中的Goos-Hänchen位移  

Goos-Hanchen shift in rectangular hBN layered gratings

作　　者：招月 金高 周胜[1,2] ZHAO Yue;JIN Gao;ZHOU Sheng(School of Physics and Electronic Engineering,Harbin Normal University,Harbin 150025,China;Department of Basic Teaching,Guangzhou Navigation University,Guangzhou 510725,China)

机构地区：[1]哈尔滨师范大学物理与电子工程学院,黑龙江哈尔滨150025 [2]广州航海学院基础教学部,广东广州510725

出　　处：《高师理科学刊》2023年第11期32-38,共7页Journal of Science of Teachers＇College and University

基　　金：哈尔滨师范大学研究生课程建设项目;哈尔滨师范大学研究生创新项目(HSDSSCX2022-49)。

摘　　要：六方氮化硼(hBN)是一种天然的范德瓦尔斯双曲材料,在两个红外波长范围内表现出双曲色散关系,可用于加强光与物质的相互作用.在目前的工作中,设计了矩形层状光栅hBN(RLG)结构,通过数值模拟发现能够增大Goos-Hänchen(GH)位移的同时具有较高的反射率.利用电场分布直接揭示了GH位移增强归因于RLG结构中的高局域的电场.值得注意的是,GH峰值的频率和宽度也可以由入射光偏振,hBN层各向异性轴方向的高度和厚度等参数来调控.基于GH位移的RLG结构传感特性,灵敏度高达1.401μm/RIU.这些结果可以为高灵敏光学传感器、光学开关和光电子探测器的设计提供有益参考.hBN is a van der Waals material which is expected to a naturally occurring hyperbolic material,exhibits natural hyperbolic dispersion relations in two ranges of infrared wavelengths that can strengthen light-matter interactions.In the present work,a rectangular laminar grating hBN(RLG)structure is designed,which is found to be able to increase the Goos-Hänchen(GH)shift with high reflectivity through numerical simulations.The electromagnetic field distribution in this structure directly reveals that enhanced GH shift can be attributed to electric field of the high localization in the RLG structure.It is worth noting that the frequency and width of the GH peak can also be regulated by parameters such as incident light polarization,height and thickness of the direction of the anisotropic axis of the hBN layer.In addition,the structure-sensing properties based on the GH shift was evaluated with a sensitivity of up to 1.401μm/RIU.The increased and controlled GH shift in the RLG structure shows promise for the applications,such as,optical sensors,optical switches and optoelectronic detectors.

关 键 词：Goos-Hänchen位移 hBN光栅 光学传感器 

分 类 号：O43[机械工程—光学工程] TB32[理学—光学]