Infrared absorption suppressed terahertz metamaterial absorber

被引:0
作者
Weng, Jian-Hong [1 ,2 ]
Li, Zhi-Gang [3 ,4 ,5 ,6 ]
Liu, Fan [1 ,2 ]
Zheng, Fu [1 ,2 ]
Wang, Bo [7 ,8 ]
Yao, Xu-Ri [3 ,4 ,6 ]
Liu, Xue-Feng [1 ,2 ]
Zhao, Qing [3 ,4 ,6 ]
Zhai, Guang-Jie [1 ,2 ]
机构
[1] Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Elect & Informat Technol Space Syst, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Beijing Inst Technol, Ctr Quantum Technol Res, Beijing 100081, Peoples R China
[4] Beijing Inst Technol, Sch Phys, Key Lab Adv Optoelect Quantum Architecture & Measu, Beijing 100081, Peoples R China
[5] Chinese Acad Sci, Inst Microelect, Beijing 100029, Peoples R China
[6] Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China
[7] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[8] Univ Chinese Acad Sci, Wenzhou Inst, Wenzhou 325001, Zhejiang, Peoples R China
关键词
THz matematerial; absorber; infrared absorption suppression; slit pattern; filter; BROAD-BAND; FREQUENCY;
D O I
10.35848/1882-0786/ace511
中图分类号
O59 [应用物理学];
学科分类号
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.
引用
收藏
页数:6
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