A low-cost single-pixel terahertz imaging method using near-field photomodulation and compressed sensing

Rongbin She; Yuanfu Lu; Wenquan Liu; Rui Zhang; Guangyuan Li

doi:10.1117/12.2537804

18 November 2019 A low-cost single-pixel terahertz imaging method using near-field photomodulation and compressed sensing

Rongbin She, Yuanfu Lu, Wenquan Liu, Rui Zhang, Guangyuan Li

Author Affiliations +

Proceedings Volume 11196, Infrared, Millimeter-Wave, and Terahertz Technologies VI; 111960O (2019) https://doi.org/10.1117/12.2537804
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

We propose and demonstrate a low-cost single-pixel terahertz imaging method based on near-field photomodulation and compressed sensing. By using monolayer graphene on a silicon substrate as the photomodulator, and a low-cost continuous-wave laser and digital micromirror device for effective patterned photomodulation, we achieve fast single-pixel terahertz imaging based on the compressed sensing algorithm. We further show that adopting a graphene on silicon substrate leads to deeper modulation depth and thus better image quality than a high-resistance silicon substrate. We expect this work will advance the development of low-cost single-pixel terahertz imaging and promote this technique into practical applications.

Citation Download Citation

Rongbin She, Yuanfu Lu, Wenquan Liu, Rui Zhang, and Guangyuan Li "A low-cost single-pixel terahertz imaging method using near-field photomodulation and compressed sensing", Proc. SPIE 11196, Infrared, Millimeter-Wave, and Terahertz Technologies VI, 111960O (18 November 2019); https://doi.org/10.1117/12.2537804

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