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Browse Journals & Magazines > Journal of Applied Physics ...> Volume:98 Issue:3 Help

Optical emission from individual InGaAs quantum dots in single-defect photonic crystal nanocavity

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6 Author(s)
Chang, W.H. ; Department of Physics and Center for Nano Science and Technology, National Central University, Chung-li 32054, Taiwan, Republic of China ; Chen, W.-Y. ; Chang, H.-S. ; Hsu, T.M.
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Collective and individual emissions from In0.5Ga0.5As quantum dots (QDs) in single-defect photonic crystal nanocavities are investigated. When the cavity mode is collectively excited by the QD ensemble, a pair of dipolelike modes with definite linear polarizations is shown. Under low excitations, single-exciton emission lines are resolved. The power dependence of individual QD emissions reveals a nearly tenfold light enhancement for on-resonance QDs. The polarization state of each individual QD is also investigated. It is found that an individual dot could excite either a pure dipole mode or a mixture of both dipole modes. This behavior can be attributed to the random distribution of QDs in the nanocavity.

Published in:
Journal of Applied Physics  (Volume:98 ,  Issue: 3 )

Date of Publication: Aug 2005

Page(s):
034306 - 034306-4
ISSN :
0021-8979
Digital Object Identifier :
10.1063/1.1953885
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Aug 2005

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