1. Ultra-high sensitivity terahertz sensor based on a five-band absorber.
- Author
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Xiao, Wenfeng, Ou, Yanghong, Wang, Shiyu, Wang, Shuai, Meng, Yanzi, Zhai, Xiang, Xia, Shengxuan, and Wang, Lingling
- Subjects
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TERAHERTZ technology , *DETECTORS , *REFRACTIVE index , *SILICA , *PHOTODETECTORS , *METAMATERIALS - Abstract
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. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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