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2019, Volume 20, Issue 5

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Frontiers of Information Technology & Electronic Engineering >> 2019, Volume 20, Issue 5 doi: 10.1631/FITEE.1800633

Terahertz time-domain spectroscopy and micro-cavity components for probing samples: a review

1. Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
2. Shanghai Cooperation Innovation Centre of Terahertz Spectroscopy and Imaging Technology, Shanghai 200093, China
3. Cooperative Innovation Center of Terahertz Science, University of Electronic Science and Technology, Chengdu 611731, China

Available online: 2019-07-08
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Abstract

We give a brief review of the developments in terahertz time-domain spectroscopy (THz-TDS) systems and microcavity components for probing samples in the University of Shanghai for Science and Technology. The broadband terahertz (THz) radiation sources based on GaAs m-i-n diodes have been investigated by applying high electric fields. Then, the free space THz-TDS and fiber-coupled THz-TDS systems produced in our lab and their applications in drug/cancer detection are introduced in detail. To further improve the signal-to-noise ratio (SNR) and enhance sensitivity, we introduce three general micro-cavity approaches to achieve tiny-volume sample detection, summarizing our previous results about their characteristics, performance, and potential applications.

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