Multiparticle interactions and stimulated emission in chemically synthesized quantum dots

A. A. Mikhailovsky, A. V. Malko, J. A. Hollingsworth, M. G. Bawendi, Victor I Klimov

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Abstract

We study the effect of multiparticle interactions on optical gain and stimulated emission in close-packed solids of chemically synthesized CdSe nanocrystals (nanocrystal quantum dots). An analysis of pump-dependent nonlinear absorption signals indicates that the band-edge optical gain is due to multiparticle states with a dominant contribution from doubly excited nanocrystals (quantum-confined biexcitons). We observe that optical gain dynamics are due to the competition between ultrafast hole surface trapping and multiparticle Auger decay. We analyze the effect of intrinsic Auger recombination on optical gain lifetimes and gain pump intensity thresholds.

Original languageEnglish
Pages (from-to)2380-2382
Number of pages3
JournalApplied Physics Letters
Volume80
Issue number13
DOIs
Publication statusPublished - Apr 1 2002

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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