Ultrahigh Q-Guided Resonance Sensor Empowered by Near Merging Bound States in the Continuum

被引：2

作者：

Liu, Zhiran ^{[1
]}

Zhou, Yi ^{[1
]}

Guo, Zhihe ^{[1
]}

Zhao, Xuyang ^{[1
]}

Luo, Man ^{[1
]}

Li, Yuxiang ^{[1
]}

Wu, Xiang ^{[1
]}

机构：

[1] Fudan Univ, Sch Informat Sci & Technol, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Dept Opt Sci & Engn,Key Lab Micro & Nano Photon St, Shanghai 200433, Peoples R China

来源：

PHOTONICS | 2022年 / 9卷 / 11期

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

bound states in the continuum; metasurfaces; high-Q resonances; sensitivity; LIGHT;

D O I：

10.3390/photonics9110852

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Bound states in the continuum (BICs) have attracted a lot of interest in the field of nanophotonics, and provide an important physical mechanism to realize high quality (Q) factor resonance. However, in practice, manufacturing error will greatly affect the Q factor. In this paper, we propose an asymmetric metasurface supporting near merging BIC under normal incidence. Such near merging BIC can achieve a higher Q factor (>10(7)) than common structures (Q similar to 10(5)) with the same degree of asymmetry in the structure. Moreover, the near merging BICs also show higher surface sensitivity than other resonant modes. Our work provides a promising approach for the realization of a high-performance biosensing platform.

引用

页数：11

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