Ultra-high sensitivity terahertz sensor based on a five-band absorber

被引：10

作者：

Xiao, Wenfeng ^{[1
]}

Ou, Yanghong ^{[1
]}

Wang, Shiyu ^{[1
]}

Wang, Shuai ^{[1
]}

Meng, Yanzi ^{[1
]}

Zhai, Xiang ^{[1
]}

Xia, Shengxuan ^{[1
]}

Wang, Lingling ^{[1
]}

机构：

[1] Hunan Univ, Key Lab Micro Nano Optoelect Devices, Minist Educ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China

来源：

JOURNAL OF OPTICS | 2022年 / 24卷 / 05期

基金：

中国国家自然科学基金;

关键词：

terahertz sensor; ultra-high sensitivity; Mie resonance; REFRACTIVE-INDEX SENSORS; BROAD-BAND; PERFECT ABSORBER; METAMATERIALS; RESONANCE;

D O I：

10.1088/2040-8986/ac5b4f

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Terahertz sensing is one of the most promising methods for label-free and noninvasive detection of refractive index changes. However, the figure of merit (FOM) of terahertz sensors in practical applications has been low. In this paper, a metamaterial sensor based on simple stacking of gold and silicon dioxide is proposed, through whose structure not only narrow-band absorption with five absorption peaks is realized, but FOM is also improved to 1792. The excellent sensing performance and the mature manufacturing technology of this kind of structure provide a platform for the design of multi-band photodetectors and high-sensitivity sensors.

引用

页数：8

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