Infrared absorption suppressed terahertz metamaterial absorber

Current terahertz metamaterial absorber (TMA) is easily disturbed by infrared (IR) radiation background in real applications. We present a TMA design method with the ability of IR absorption suppression, which uses the slit pattern on the metal surface to control the absorption spectrum. Experimenta...

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Published in:Applied physics express 2023-07, Vol.16 (7), p.72006
Main Authors: Weng, Jian-Hong, Li, Zhi-Gang, Liu, Fan, Zheng, Fu, Wang, Bo, Yao, Xu-Ri, Liu, Xue-Feng, Zhao, Qing, Zhai, Guang-Jie
Format: Article
Language:English
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absorber
filter
infrared absorption suppression
slit pattern
THz matematerial
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container_issue 7
container_start_page 72006
container_title Applied physics express
container_volume 16
creator Weng, Jian-Hong
Li, Zhi-Gang
Liu, Fan
Zheng, Fu
Wang, Bo
Yao, Xu-Ri
Liu, Xue-Feng
Zhao, Qing
Zhai, Guang-Jie
description Current terahertz metamaterial absorber (TMA) is easily disturbed by infrared (IR) radiation background in real applications. We present a TMA design method with the ability of IR absorption suppression, which uses the slit pattern on the metal surface to control the absorption spectrum. Experimental results show that the designed and processed TMA produces an absorption peak of more than 80% at the resonant frequency of 1.33 THz and achieves less than 3% absorption in IR bands above 12 THz. The photothermal conversion noise caused by IR absorption at room temperature can be decreased by 20.9 times compared with a previous design. We believe it provides new paths in the TMA research and is helpful for the development of high-sensitivity THz microbolometer.
doi_str_mv 10.35848/1882-0786/ace511
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subjects absorber
filter
infrared absorption suppression
slit pattern
THz matematerial
title Infrared absorption suppressed terahertz metamaterial absorber
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