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Title: Anti-Stokes luminescence in the light of second order perturbation theory

Anti-Stokes photoluminescence is measured in high-quality GaAs quantum wells. The primary pathway for interband optical absorption and hence emission under subbandgap photoexcitation is the optical phonon-mediated second-order electric dipole transition. This conclusion is drawn from the remarkable agreement between predictions of second-order perturbation calculation and the measured intensity of anti-Stokes photoluminescence, both as function of the detuning wavelength and temperature. The results are of direct relevance to laser cooling of solids where phonon-assisted upconversion is a necessary condition.
Authors:
; ;  [1]
  1. Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal 741246 (India)
Publication Date:
OSTI Identifier:
22391922
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; COOLING; E1-TRANSITIONS; GALLIUM ARSENIDES; PERTURBATION THEORY; PHONONS; PHOTOLUMINESCENCE; QUANTUM WELLS