Design and performance of a terahertz Fourier transform spectrometer for axion dark matter experiments

Dona, K., Liu, J., Kurinsky, N., Miller, D., Barry, Peter, Chang, C. and Sonnenschein, A. 2022. Design and performance of a terahertz Fourier transform spectrometer for axion dark matter experiments. Journal of Instrumentation 17 (06) , P06014. 10.1088/1748-0221/17/06/P06014

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Abstract

Dedicated spectrometers for terahertz radiation with [0.3, 30] THz frequencies using traditional optomechanical interferometry are substantially less common than their infrared and microwave counterparts. This paper presents public documentation for the design and initial performance measurements of a tabletop Fourier transform spectrometer (FTS) for terahertz spectral analysis using infrared optics in a Michelson arrangement. This is coupled to a broadband pyroelectric photodetector designed for [0.1, 30] THz frequencies. We measure spectra of narrowband and broadband input radiation to characterize the performance of this instrument above 10 THz, where signal-to-noise is high. This device is constructed in the context of research-and-development for the recently-proposed Broadband Reflector Experiment for Axion Detection (BREAD), where the optical components can be applied to ongoing efforts for testing the pilot experiment.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Publisher:	IOP Publishing
ISSN:	1748-0221
Date of Acceptance:	8 May 2022
Last Modified:	13 Jan 2023 12:45
URI:	https://orca.cardiff.ac.uk/id/eprint/155692

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