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.
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页数：8
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