Improving the performance of THz delivery from a quantum cascade laser within a dry 3He dilution refrigerator

Vaughan, M. orcid.org/0000-0002-8336-2183, Michailow, W., Tan, M. et al. (7 more authors) (2023) Improving the performance of THz delivery from a quantum cascade laser within a dry 3He dilution refrigerator. In: 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 48th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 17-22 Sep 2023, Montreal, Canada. IEEE ISBN 979-8-3503-3661-0

Abstract

We demonstrate a substantial enhancement to the integration of a quantum cascade laser into a dilution refrigerator via waveguides by the inclusion of a multi-mesh 6THz low-pass filter to block IR radiation, and a Winston cone to focus light output from the waveguide. These alterations allow us to lower the base temperatures to ∼114 mK, and the sample temperature to ∼160 mK while detecting a cyclotron resonance (CR) response in a 2DEG illuminated within the refrigerator. For comparison, before these changes we achieve a base temperature of 206mK and an effective sample temperature of 430mK while detecting CR [1].

Metadata

Item Type:	Proceedings Paper
Authors/Creators:	Vaughan, M. https://orcid.org/0000-0002-8336-2183 Michailow, W. Tan, M. Salih, M. Li, L. Beere, H. Ritchie, D A Linfield, E H Davies, A G Cunningham, J E
Copyright, Publisher and Additional Information:	© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Keywords:	Low-pass filters, Waveguide lasers, HEMTs, Quantum cascade lasers, MODFETs, Cyclotrons
Dates:	Published: 31 October 2023 Published (online): 31 October 2023 Accepted: 30 June 2023
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds)
Funding Information:	Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/P021859/1 EPSRC (Engineering and Physical Sciences Research Council) EP/W028921/1 EPSRC (Engineering and Physical Sciences Research Council) EP/V004743/1
Depositing User:	Symplectic Publications
Date Deposited:	20 Jul 2023 08:47
Last Modified:	20 Dec 2023 12:45
Published Version:	https://ieeexplore.ieee.org/document/10299280
Status:	Published
Publisher:	IEEE
Identification Number:	10.1109/IRMMW-THz57677.2023.10299280
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:201507

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Improving the performance of THz delivery from a quantum cascade laser within a dry 3He dilution refrigerator

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