Single-shot terahertz spectrometer using a microbolometer camera

We demonstrate a single-shot terahertz spectrometer consisting of a modified Mach–Zehnder interferometer and a microbolometer focal plane array. The spectrometer is simple to use and can measure terahertz field autocorrelations and spectral power with no moving parts and no ultrashort-pulsed laser....

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Bibliographic Details
Published in:Applied physics letters 2020-08, Vol.117 (9)
Main Authors: Jang, Dogeun, Jin, Hanran, Kim, Ki-Yong
Format: Article
Language:English
Subjects:
Applied physics
Focal plane devices
Laser applications
Lasers
Mach-Zehnder interferometers
Pulsed lasers
Refractivity
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Summary:We demonstrate a single-shot terahertz spectrometer consisting of a modified Mach–Zehnder interferometer and a microbolometer focal plane array. The spectrometer is simple to use and can measure terahertz field autocorrelations and spectral power with no moving parts and no ultrashort-pulsed laser. It can effectively detect radiation at 10–40 THz when tested with a thermal source. It can also be used to measure the complex refractive index of a sample material. In principle, it can characterize both laser-based and non-laser-based terahertz sources and potentially cover 1–10 THz with specially designed terahertz microbolometers.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0016509