Low-cost thermal-infrared 'THz-Torch' spectroscopy

Komies, Saleh, Sun, Jingye, Hodges, Chris ORCID: https://orcid.org/0000-0002-4993-4547, Lynch, Stephen A. ORCID: https://orcid.org/0000-0001-9818-2284, Watson, Jonathan S. and Lucyszyn, Stepan 2024. Low-cost thermal-infrared 'THz-Torch' spectroscopy. IEEE Access 12 , pp. 21868-21885. 10.1109/ACCESS.2024.3359054

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Abstract

The low-cost thermal infrared ‘THz-Torch’ concept (referred to here as ‘THz-T’) was first introduced over a decade ago, and since then the associated ‘over the THz horizon’ thermal infrared (10-100 THz) implementation technologies have continued to advance. While short range secure wireless communications links have received a great deal of attention, material spectroscopy has only briefly been introduced in a short conference abstract. Here, for the first time, we explore in depth the basic concepts behind THz-T spectroscopy. Moreover, when compared to the unvalidated results within our previous work, we demonstrate an enhanced experimental THz-T spectrometer. A detailed thermal noise power link budget model for both the transmission and reflection modes of operation have been undertaken and independently validated. As a proof of principle, a diverse array of different material types has been characterized. This includes glass sheets, semiconductor wafers, ceramic plate, plastic tape, plastic sheets, as well as polymer and cotton paper banknotes. THz-T technology has the advantages of hardware simplicity and low cost non-destructive testing for ubiquitous applications.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	Institute of Electrical and Electronics Engineers
ISSN:	2169-3536
Date of First Compliant Deposit:	9 February 2024
Last Modified:	25 Mar 2024 15:45
URI:	https://orca.cardiff.ac.uk/id/eprint/166035

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