Ultrafast THz intersubband polariton saturable absorber integrated with a quantum cascade frequency comb

Viti, L, Mezzapesa, FP, Raab, J et al. (6 more authors) (2020) Ultrafast THz intersubband polariton saturable absorber integrated with a quantum cascade frequency comb. In: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 45th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 08-13 Nov 2020, Buffalo, NY, USA. IEEE , p. 1. ISBN 978-1-7281-6620-9

Abstract

We devise a THz polaritonic saturable absorber exploiting ultra-strong coupled intersubband cavity polaritons generated in a multi quantum well (MQW) heterostructure. By coupling the polaritonic saturable absorber reflector with a high bandwidth heterogeneous THz QCL frequency comb (2.3-3.8 THz) we demonstrate spectral reshaping of the QCL emission and a major increase of the comb operational dynamic range up to 38% characterized by a stable single and narrow intermode beatnote.

Metadata

Authors/Creators:	Viti, L Mezzapesa, FP Raab, J Li, L https://orcid.org/0000-0003-4998-7259 Davies, AG https://orcid.org/0000-0002-1987-4846 Linfield, EH Lange, C Huber, R Vitiello, MS
Keywords:	Couplings; Bandwidth; Dynamic range; Polaritons; Quantum cascade lasers; Quantum well devices
Dates:	Accepted: 8 November 2020 Published: 11 November 2020
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) The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM) > Specialist Science Education Dept (Leeds)
Depositing User:	Symplectic Publications
Date Deposited:	14 May 2021 14:49
Last Modified:	14 May 2021 14:49
Status:	Published
Publisher:	IEEE
Identification Number:	https://doi.org/10.1109/irmmw-thz46771.2020.9370406

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Ultrafast THz intersubband polariton saturable absorber integrated with a quantum cascade frequency comb

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