折射率
蓝移
波长
光学
频移
反射(计算机编程)
物理
反射率
红移
计算机科学
量子力学
光致发光
银河系
程序设计语言
作者
Xiaowei Jiang,Bin Fang,Chunlian Zhan
出处
期刊:Micromachines
[MDPI AG]
日期:2023-05-25
卷期号:14 (6): 1109-1109
被引量:2
摘要
The enhancement of the Goos-Hänchen (GH) shift has become a research hotspot due to its promoted application of the GH effect in various fields. However, currently, the maximum GH shift is located at the reflectance dip, making it difficult to detect GH shift signals in practical applications. This paper proposes a new metasurface to achieve reflection-type bound states in the continuum (BIC). The GH shift can be significantly enhanced by the quasi-BIC with a high quality factor. The maximum GH shift can reach more than 400 times the resonant wavelength, and the maximum GH shift is located exactly at the reflection peak with unity reflectance, which can be applied to detect the GH shift signal. Finally, the metasurface is used to detect the variation in the refractive index, and the sensitivity can reach 3.58 × 106 μm/RIU (refractive index unit) according to the simulation's calculations. The findings provide a theoretical basis to prepare a metasurface with high refractive index sensitivity, a large GH shift, and high reflection.
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