Bound States in the Continuum in a T-Shape Nanohole Array Perforated in a Photonic Crystal Slab

被引：20

作者：

Xie, Suxia ^{[1
,2
,3
]}

Xie, Song ^{[1
]}

Zhan, Jie ^{[1
]}

Xie, Changzhong ^{[1
]}

Tian, Guang ^{[1
]}

Li, Zhijian ^{[1
,3
,4
]}

Liu, Qiong ^{[1
]}

机构：

[1] Hunan Univ Sci & Technol, Sch Phys & Elect Sci, Xiangtan, Peoples R China

[2] Univ Shanghai Sci & Technol, Sch Mech Engn, Shanghai, Peoples R China

[3] Univ Wisconsin, Dept Elect & Comp Engn, 1415 Johnson Dr, Madison, WI 53706 USA

[4] Hunan Univ, Coll Elect & Informat Engn, Changsha, Peoples R China

来源：

PLASMONICS | 2020年 / 15卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Photonic crystal; Nanohole array; Bound states in the continuum; Q-factor; Refractive index; MODES; ABSORPTION; RESONANCES; LAYER; WAVES;

D O I：

10.1007/s11468-020-01140-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have studied the reflectance spectra of T-shape nanohole array in a layer of Photonic crystal (PhC) slab. Results show that light can be confined perfectly in the PhC slab at a given incident angle at a suitable hole shape, hole size, layer thickness, and refractive index of surrounding medium. We obtained that the Q-factor at BIC can exceed 10(5), and the wavelength, incident angle of BIC can be modulated by structure parameters and surrounding mediums dielectric factor. Especially, the BIC has high sensitivity to the refractive index of the surrounding medium. The results can be helpful in the design of new-type photonics devices, such as filters and sensors.

引用

页码：1261 / 1271

页数：11

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