Spectral diffusion and line broadening in single self-assembled GaAs/AlGaAs quantum dot photoluminescence

被引：67

作者：

Abbarchi, M. ^{[1
,2
]}

Troiani, F. ^{[3
,4
]}

Mastrandrea, C. ^{[1
,2
]}

Goldoni, G. ^{[3
,4
]}

Kuroda, T. ^{[5
]}

Mano, T. ^{[5
]}

Sakoda, K. ^{[5
]}

Koguchi, N. ^{[6
,7
]}

Sanguinetti, S. ^{[6
,7
]}

Vinattieri, A. ^{[1
,2
]}

Gurioli, M. ^{[1
,2
]}

机构：

[1] Univ Florence, European Lab Nonlinear Spect, I-50019 Florence, Italy

[2] Univ Florence, Dipartimento Fis, I-50019 Florence, Italy

[3] Univ Modena, Ist Nazl Fis Mat, I-41100 Modena, Italy

[4] Univ Modena, Dipartimento Fis, I-41100 Modena, Italy

[5] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[6] Univ Milano Bicocca, LNESS, I-120125 Milan, Italy

[7] Univ Milano Bicocca, Dipartimento Sci Mat, I-120125 Milan, Italy

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 16期

关键词：

D O I：

10.1063/1.3003578

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We experimentally and theoretically investigate the photoluminescence broadening of different excitonic complexes in single self-assembled GaAs/AlGaAs quantum dots. We demonstrate that the excitonic fine-structure splitting leads to a sizable line broadening whenever the detection is not resolved in polarization. The residual broadening in polarized measurements is systematically larger for the exciton with respect to both the trion and the biexciton recombination. The experimental data agree with calculations of the quantum confined Stark effect induced by charge defects in the quantum dot (QD) environment, denoting the role of the QD spectator carrier rearrangement in reducing the perturbation of the fluctuating environment. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3003578]

引用

页数：3

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