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

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 silic...

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Published in:Journal of optics (2010) 2022-05, Vol.24 (5), p.55102
Main Authors: Xiao, Wenfeng, Ou, Yanghong, Wang, Shiyu, Wang, Shuai, Meng, Yanzi, Zhai, Xiang, Xia, Shengxuan, Wang, Lingling
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Language:English
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Mie resonance
terahertz sensor
ultra-high sensitivity
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cited_by cdi_FETCH-LOGICAL-c280t-14251f9cef72b3837707f387235fdd42612634a973b11e8b27025581a9fd05c03
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description 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.
doi_str_mv 10.1088/2040-8986/ac5b4f
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subjects Mie resonance
terahertz sensor
ultra-high sensitivity
title Ultra-high sensitivity terahertz sensor based on a five-band absorber
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