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Quantum degeneracy and phase-space density in superradiant semiconductor heterostructures at room temperature

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Penty, RV 

Abstract

jats:titleAbstract</jats:title> jats:pWe investigate the fulfilment of the quantum degeneracy criterium in bulk GaAs/AlGaAs heterostructures operated under the superradiant emission generation at room temperature. The e-h density has been evaluated by analysing both spontaneous window emission from above the samples and amplified spontaneous emission radiated from their edges. The maximum experimental value of the phase-space density is 1.31 at <jats:inline-formula id="epl20448ieqn1"> jats:tex-math</jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="epl20448ieqn1.gif" xlink:type="simple" /> </jats:inline-formula>. It is supposed that resonant photons with energies at the band gap establish coherence within the e-h ensemble and facilitate the build-up of a macroscopic wave packet from overlapped wave functions of collectively paired electrons and holes. As a result, the photon-mediated “stimulated” condensation of e-h pairs in phase space can take place at room temperature.</jats:p>

Description

Keywords

5108 Quantum Physics, 5102 Atomic, Molecular and Optical Physics, 51 Physical Sciences

Journal Title

EPL

Conference Name

Journal ISSN

0295-5075
1286-4854

Volume Title

133

Publisher

IOP Publishing

Rights

All rights reserved
Sponsorship
EPSRC (via University of York) (EP/T001011/1)
EPSRC (Grant # EP/M013472/1)