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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 4 — Apr. 1, 2012
  • pp: 676–682

Laser cooling with PbSe colloidal quantum dots

Galina Nemova and Raman Kashyap  »View Author Affiliations


JOSA B, Vol. 29, Issue 4, pp. 676-682 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000676


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Abstract

We present a theoretical scheme for laser cooling with colloidal lead-salt PbSe quantum dots (QDs) doped in a glass host. The laser cooling process is based on the anti-Stokes fluorescence in QDs. 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 the PbSe QD in comparison with the absorption cross section of rare-earth ions doped in glasses or crystals increases the efficiency of the cooling process considerably, lowering the pump power requirements.

© 2012 Optical Society of America

OCIS Codes
(140.3320) Lasers and laser optics : Laser cooling
(140.6810) Lasers and laser optics : Thermal effects
(160.6000) Materials : Semiconductor materials

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: September 19, 2011
Revised Manuscript: November 29, 2011
Manuscript Accepted: December 6, 2011
Published: March 16, 2012

Citation
Galina Nemova and Raman Kashyap, "Laser cooling with PbSe colloidal quantum dots," J. Opt. Soc. Am. B 29, 676-682 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-4-676

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