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Proceedings Paper

Laser cooling with lead-salt colloidal quantum dots doped in a glass host
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Paper Abstract

We present a scheme, in which colloidal lead-salt PbSe QDs doped in a glass host are used for laser cooling with anti- Stokes fluorescence. The relatively short (microsecond range) lifetime of the excited level of the PbSe QD allows the cooling process to be accelerated, and new materials with higher phonon energy to be used as hosts, which are normally considered unsuitable for cooling with rare-earth ions. The considerable increase (by ~104) in the absorption cross section of PbSe QD in comparison with the absorption cross section of the rare-earth ions doped in glasses or crystals increases the efficiency of the cooling process considerably, lowering the pump power requirements.

Paper Details

Date Published: 8 February 2012
PDF: 8 pages
Proc. SPIE 8275, Laser Refrigeration of Solids V, 82750B (8 February 2012); doi: 10.1117/12.909430
Show Author Affiliations
Galina Nemova, Ecole Polytechnique de Montréal (Canada)
Raman Kashyap, Ecole Polytechnique de Montréal (Canada)

Published in SPIE Proceedings Vol. 8275:
Laser Refrigeration of Solids V
Richard I. Epstein; Mansoor Sheik-Bahae, Editor(s)

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