Multiparticle interactions and stimulated emission in chemically synthesized quantum dots

被引：82

作者：

Mikhailovsky, AA ^{[1
]}

Malko, AV ^{[1
]}

Hollingsworth, JA ^{[1
]}

Bawendi, MG ^{[1
]}

Klimov, VI ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 13期

关键词：

D O I：

10.1063/1.1463704

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2002 American Institute of Physics.

引用

页码：2380 / 2382

页数：3

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