Mid-infrared intersubband absorption from p-Ge quantum wells grown on Si substrates

Gallacher, K., Ballabio, A., Millar, R., Frigerio, J., Bashir, A., MacLaren, I. , Isella, G., Ortolani, M. and Paul, D. J. (2016) Mid-infrared intersubband absorption from p-Ge quantum wells grown on Si substrates. ECS Transactions, 75(8), pp. 253-256. (doi:10.1149/07508.0253ecst)

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Abstract

Mid-infrared intersubband absorption from p-Ge quantum wells with Si0.5Ge0.5 barriers grown on a relaxed Si0.2Ge0.8 buffer on a Si substrate is demonstrated from 6 to 9 μm wavelength at room temperature and can be tuned by adjusting the quantum well thickness. Fourier transform infra-red transmission demonstrate clear absorption peaks corresponding to intersubband transitions among confined hole states. The work indicates an approach that will allow quantum well intersubband photodetectors to be realized on Si substrates in the important atmospheric transmission window of 8-13 μm where many chemical and biological molecules have unique molecular absorption lines for spectroscopic identification.

Item Type:Articles
Additional Information:PRiME 2016/230th ECS Meeting, Honolulu, HI, USA, 2-7 Oct 2016.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Millar, Mr Ross and Bashir, Ms Aneeqa and MacLaren, Dr Ian and Paul, Professor Douglas and Gallacher, Dr Kevin
Authors: Gallacher, K., Ballabio, A., Millar, R., Frigerio, J., Bashir, A., MacLaren, I., Isella, G., Ortolani, M., and Paul, D. J.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Physics and Astronomy
Journal Name:ECS Transactions
Publisher:The Electrochemical Society
ISSN:1938-6737
ISSN (Online):1938-6737
Copyright Holders:Copyright © 2016 The Eletrochemical Society
First Published:First published in ECS Transactions 75(8):253-256
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
694301Engineering Quantum Technology Systems on a Silicon PlatformDouglas PaulEngineering & Physical Sciences Research Council (EPSRC)EP/N003225/1ENG - ENGINEERING ELECTRONICS & NANO ENG