Real-time terahertz spectroscopy of a deuterium exchange in the vapor phase utilizing a room-temperature 8 × 8 TeraFET detector array

North, N.K., Horbury, M.D., Godden, H. orcid.org/0009-0000-7808-0926 et al. (7 more authors) (2026) Real-time terahertz spectroscopy of a deuterium exchange in the vapor phase utilizing a room-temperature 8 × 8 TeraFET detector array. In: 2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 17-22 Aug 2025, Helsinki, Finland. IEEE. ISBN: 979-8-3503-7884-9. ISSN: 2162-2027. EISSN: 2162-2035.

Abstract

We have demonstrated real-time terahertz (THz) sensing using a 3.4-THz quantum-cascade laser (QCL) source and a fast 8×8 TeraFET detector array. We show that the 15-MHz detector bandwidth enables swept scan measurements across a ~2 GHz spectroscopic tuning range at a rate of 230 spectra/s, or single-frequency continuous monitoring of methanol vapor diffusion at 150k samples/s. Taking advantage of the high sample speeds, a deuterium exchange between methanol and deuterium oxide was monitored in real time using an integration time constant of 10 ms.

Metadata

Item Type:	Proceedings Paper
Authors/Creators:	North, N.K. Horbury, M.D. Godden, H. https://orcid.org/0009-0000-7808-0926 Holstein, J. Kundu, I. Li, L.H. Lisauskas, A. Roskos, H. Stone, D. Valavanis, A.
Keywords:	Deuterium, Phased arrays, Spectroscopy, Measurement by laser beam, Detectors, Real-time systems, Sensors, Quantum cascade lasers, Monitoring, Methanol
Dates:	Published (online): 14 January 2026 Published: 14 January 2026
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds)
Date Deposited:	27 Jan 2026 10:36
Last Modified:	27 Jan 2026 16:18
Published Version:	https://ieeexplore.ieee.org/document/11320040
Status:	Published
Publisher:	IEEE
Identification Number:	10.1109/irmmw-thz61557.2025.11320040
Related URLs:	Dataset
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:236609

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Real-time terahertz spectroscopy of a deuterium exchange in the vapor phase utilizing a room-temperature 8 × 8 TeraFET detector array

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Real-time terahertz spectroscopy of a deuterium exchange in the vapor phase utilizing a room-temperature 8 × 8 TeraFET detector array

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