Tunable THz spectrum analyzer with hyperspectral resolution

被引：1

作者：

He, Xin ^{[1
,2
,3
]}

Yao, Mingjia ^{[1
]}

Qian, Chengwei ^{[1
]}

Meng, Leixin ^{[2
]}

Liu, Xiaowei ^{[2
]}

Tang, Wenhao ^{[2
]}

Shen, Xiaoming ^{[4
]}

Beckett, Paul ^{[5
]}

Xiao, Duo ^{[1
]}

Liu, Xu ^{[3
]}

Yin, Rui ^{[1
]}

机构：

[1] Hangzhou City Univ, Sch Informat & Elect Engn, Hangzhou 310015, Peoples R China

[2] Zhejiang Lab, Res Ctr Humanoid Sensing, Hangzhou 311121, Peoples R China

[3] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China

[4] Zhejiang Lab, Res Ctr Intelligent Chips & Devices, Hangzhou 311121, Peoples R China

[5] RMIT Univ, STEM Coll, Melbourne, Vic 3000, Australia

来源：

CHINESE OPTICS LETTERS | 2024年 / 22卷 / 07期

基金：

中国国家自然科学基金;

关键词：

tunable metamaterial; plasmonics; spectrum analyzer; TERAHERTZ; FREQUENCY;

D O I：

10.3788/COL202422.073601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a tunable terahertz (THz) spectrum analyzer with hyperspectral resolution formed from electrically tunable metamaterial and plasmonic structures. As few as eight encoders based on four detectors are needed to recover 396 spectral bands. The incident spectra in the range of 1-5 THz can be reconstructed with a localization precision of 0.3 GHz and a minimum average mean squared error (MSE) of 6.9 x 10-5. Our proposed analyzers are faster and more portable than those based on frequency combs and power meters, and more accurate than existing Fourier transform techniques, showing promising applications in pathology, biomedical imaging, and many other areas.

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页数：6

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