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Photodiodes for Terahertz Applications

Seddon, J; Natrella, M; Lin, X; Graham, C; Renaud, CC; Seeds, AJ; (2021) Photodiodes for Terahertz Applications. IEEE Journal of Selected Topics in Quantum Electronics 10.1109/JSTQE.2021.3108954. (In press). Green open access

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Abstract

Terahertz generation using high-speed photodiodes has found commercial application in many areas ranging across spectroscopy, imaging and communications. In this paper we discuss the optimization of high-speed photodiodes in terms of bandwidth and output power. We identify some of the main limitations in the generation of high output power in the Terahertz frequency band. We present a modelling tool for the numerical evaluation of antenna coupled uni-travelling carrier photodiodes and experimental evaluation of the fabricated designs. We also present a thermal analysis of the photodiodes alongside pulsed measurements of the output power saturation.

Type: Article
Title: Photodiodes for Terahertz Applications
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JSTQE.2021.3108954
Publisher version: https://doi.org/10.1109/JSTQE.2021.3108954
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: THz photomixing, THz antennas, high-speed photodiodes, UTC-Photodiodes, Terahertz Radiation
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10134789
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