Reeder, R., Ikonić, Z., Harrison, P. et al. (2 more authors) (2007) Laterally pumped GaAs/AlGaAs quantum wells as sources of broadband terahertz radiation. Journal of Applied Physics, 102 (073715). ISSN 1089-7550
Abstract
In this work we consider lateral current pumped GaAs/AlGaAs quantum wells as sources of incoherent terahertz radiation. The lateral field heats the electrons in a two-dimensional quantum layer and increases the population of higher subbands, hence also increasing the radiation power generated in spontaneous intersubband emission processes. Digitally graded quasi-parabolic and simple square quantum wells are considered, and the advantages of both types are discussed. Calculations at lattice temperatures of 77 K and 300 K, for electric fields up to 10 kV/cm, show that the optical output power of ~100−200 W/m2 may be achieved for the 7 THz source. The main peak of the spectrum, at 7 THz, of the quasi-parabolic quantum well exceeds the black body radiation at 300 K by approximately a factor of two and by two orders of magnitude at 77 K.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Copyright © 2007 American Institute of Physics |
Dates: |
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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) |
Depositing User: | Sherpa Assistant |
Date Deposited: | 06 Nov 2007 11:02 |
Last Modified: | 27 Oct 2016 20:11 |
Published Version: | http://dx.doi.org/10.1063/1.2783779 |
Status: | Published |
Publisher: | The American Institute of Physics |
Identification Number: | 10.1063/1.2783779 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:3450 |