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Frequency upconverted lasing of nanocrystal quantum dots in microbeads

Appl. Phys. Lett. 95, 183109 (2009); doi:10.1063/1.3242352

Published 6 November 2009

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Chunfeng Zhang,1 Fan Zhang,1 An Cheng,1 Brian Kimball,2 Andrew Y. Wang,3 and Jian Xu1
1Department of Engineering Science and Mechanics, The Pennsylvania State University, State College, Pennsylvania 16802, USA
2Nanomaterials Science Team, U.S. Army, Natick Soldier Research Development and Engineering Center, Natic, Massachusetts 01760, USA
3Ocean NanoTech LLC., Fayetteville, Arkansas 72701, USA
Stable, frequency upconverted lasing of semiconductor nanocrystal quantum dots was demonstrated in silica microbeads under two-photon pumping conditions. Upon infrared excitation, the stimulated emission of the nanocrystal-doped microbeads exhibits sharp peaks at lambda~610  nm with narrow line widths of <=1  nm. The lasing action has been attributed to the biexciton gain coupled to the whispering gallery modes in spherical cavities, as confirmed by time-resolved photoluminescence spectra. The lasing lifetime characterized in term of pulse numbers (~106 pulses) was two orders of magnitude longer than that of the dye salt-based two-photon lasers. ©2009 American Institute of Physics
History: Received 26 May 2009; accepted 8 September 2009; published 6 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/183109/1
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KEYWORDS and PACS

Keywords
PACS
  • 78.67.Hc
    Optical properties of quantum dots
  • 78.55.-m
    Photoluminescence, properties and materials (condensed matter)
  • 78.47.Cd
    Time-resolved luminescence in condensed matter
  • 07.10.Cm
    Micromechanical devices and systems
  • 85.85.+j
    Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
  • 78.45.+h
    Stimulated emission (condensed matter)
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (22)
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