Multicolor T-Ray Imaging Using Multispectral Metamaterials

Advanced Science
Zhitao ZhouTiger H Tao

Abstract

Recent progress in ultrafast spectroscopy and semiconductor technology is enabling unique applications in screening, detection, and diagnostics in the Terahertz (T-ray) regime. The promise of efficaciously operation in this spectral region is tempered by the lack of devices that can spectrally analyze samples at sufficient temporal and spatial resolution. Real-time, multispectral T-ray (Mul-T) imaging is reported by designing and demonstrating hyperspectral metamaterial focal plane array (MM-FPA) interfaces allowing multiband (and individually tunable) responses without compromising on the pixel size. These MM-FPAs are fully compatible with existing microfabrication technologies and have low noise when operating in the ambient environment. When tested with a set of frequency switchable quantum cascade lasers (QCLs) for multicolor illumination, both MM-FPAs and QCLs can be tuned to operate at multiple discrete THz frequencies to match analyte "fingerprints." Versatile imaging capabilities are presented, including unambiguous identification of concealed substances with intrinsic and/or human-engineered THz characteristics as well as effective diagnosis of cancerous tissues without notable spectral signatures in the THz range, und...Continue Reading

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Citations

Sep 13, 2018·Nanotechnology·Xiaoyong HeWangzhou Shi
Jul 8, 2020·Optics Letters·Fengwei Zhan, Yu-Sheng Lin
Apr 11, 2020·Nanoscale Research Letters·Yu-Sheng LinBo-Ru Yang
Jun 6, 2019·Optics Express·Xiaoyong HeWangzhou Shi
Dec 12, 2020·Heliyon·Zohreh VafapourHossain Ghahraloud
Jun 23, 2021·Optics Express·Arthur Salmon, Patrick Bouchon

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Methods Mentioned

BETA
imaging techniques
chips
imaging technique

Software Mentioned

COMSOL Multiphysics
CST Microwave Studio
Mul

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