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

Gallacher, K., Ballabio, A., Millar, R.W., 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. Applied Physics Letters, 108(9), 091114. (doi:10.1063/1.4943145)

Gallacher, K., Ballabio, A., Millar, R.W., 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. Applied Physics Letters, 108(9), 091114. (doi:10.1063/1.4943145)

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Abstract

Mid-infrared intersubband absorption from p-Ge quantum wells with Si0.5Ge0.5 barriers grown 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 and photoluminescence measurements 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.

Item Type:Articles
Additional Information:Funding from the European Union Seventh Framework Programme (no: 613055) and UK EPSRC (no: EP/N003225/1)
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.W., 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:Applied Physics Letters
Publisher:American Institute of Physics
ISSN:0003-6951
ISSN (Online):1077-3118
Copyright Holders:Copyright © 2016 AIP Publishing LLC
First Published:First published in Applied Physics Letters 108(9):091114
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