Infrared absorption suppressed terahertz metamaterial absorber

Jian Hong Weng, Zhi Gang Li, Fan Liu*, Fu Zheng, Bo Wang, Xu Ri Yao*, Xue Feng Liu*, Qing Zhao, Guang Jie Zhai

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

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.

源语言英语
文章编号072006
期刊Applied Physics Express
16
7
DOI
出版状态已出版 - 1 7月 2023

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