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Superfluorescent Pulsed Emission from Biexcitons in an Ensemble of CuCl Quantum Dots

Published online by Cambridge University Press:  31 January 2011

Kensuke Miyajima ,
Shingo Saito ,
Masaaki Ashida  and
Tadashi Itoh
Kensuke Miyajima
Affiliation:
miyajima@laser.mp.es.osaka-u.ac.jp, Graduate School of Engineering Science, Osaka University, Materials Engineering Science, Toyonaka, Japan
Shingo Saito
Affiliation:
sshingo@nict.go.jp, National Institute of Information and Communications Technology, Kobe, Japan
Masaaki Ashida
Affiliation:
ashida@mp.es.osaka-u.ac.jp, Graduate School of Engineering Science, Osaka University, Materials Engineering Science, Toyonaka, Japan
Tadashi Itoh
Affiliation:
itoh@mp.es.osaka-u.ac.jp, Graduate School of Engineering Science, Osaka University, Materials Engineering Science, Toyonaka, Japan
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Abstract

Time-resolved photoluminescence spectra of an ensemble of CuCl quantum dots have been measured by an optical Kerr gate method. The excitation photon energy was tuned to resonant energy for two-photon excitation of biexcitons. We observed that the time profiles of biexciton bands were changed from an exponential fast decay to a pulsed shape. This result indicates a transition from amplified spontaneous emission to superfluorescence. These results will introduce a new field of coherent phenomena originating an ensemble of quantum dots.

Keywords

optical propertiesnanostructureluminescence
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1208: Symposium O – Excitons and Plasmon Resonances in Nanostructures II , 2009 , 1208-O09-21
Copyright
Copyright © Materials Research Society 2010

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