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An efficient terahertz detector based on an optical hybrid cavity

Siday, T; Thompson, RJ; Glass, S; Luk, TS; Reno, JL; Brener, I; Mitrofanov, O; (2018) An efficient terahertz detector based on an optical hybrid cavity. In: (Proceedings) SPIE OPTO, 2018. SPIE Green open access

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Abstract

We demonstrate an efficient terahertz (THz) detector based on an optical hybrid cavity, which consists of an optically thin photoconductive layer between a distributed Bragg reflector (DBR) and an array of electrically isolated nanoantennas. Using a combination of numerical simulations and optical experiments, we find a hybrid cavity design which absorbs <75% of incident light with a 50 nm photoconductive layer. By integrating this optical hybrid cavity design into a THz detector, we see enhanced detection sensitivity at the operation wavelength (∼815 nm) over designs which do not include the nanoantenna array.

Type: Proceedings paper
Title: An efficient terahertz detector based on an optical hybrid cavity
Event: SPIE OPTO, 2018
ISBN-13: 9781510615472
Open access status: An open access version is available from UCL Discovery
DOI: 10.1117/12.2290971
Publisher version: https://doi.org/10.1117/12.2290971
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
UCL classification: UCL
UCL > Provost and Vice Provost Offices
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/10060264
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