Double Symmetry-Protected Bound States in the Continuum in an All-Dielectric Metasurface for Refractive Index Sensing

被引：0
|
作者：
Guanghou Sun
Xingbing Chao
Jianqiang Liu
Qingkai Wang
Zhangyong Chang
Jianning Wei
机构：
[1] Jiujiang University,School of Science
[2] Jiangxi Province Key of Microstructure Functional Materials,undefined
来源：
Plasmonics | 2022年 / 17卷
关键词：
All-dielectric; Metasurface; Bound states in the continuum; Sensing;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We numerically investigated double symmetry-protected bound states in the continuum (BICs) in an all-dielectric metasurface composed of a periodically arranged silicon disk etched with a rectangular slot. Quality factors of the double BICs promptly increase with the decrease of the asymmetry parameter, and their electric fields are locally enhanced in surrounding medium. The refractive index sensor based on the double BICs exhibits excellent performance with figures of merit of 3243 and 171,965, respectively. Our proposed metasurface will open up avenues for the development of applications in multiwavelength sensors, narrow-band filters, optical switches, and nonlinear optics.
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页码：2467 / 2472
页数：5
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