Interplay of surface charges and excitons localized in CdSe/ZnSe quantum dots

被引：8

作者：

Türck, V ^{[1
]}

Rodt, S ^{[1
]}

Heitz, R ^{[1
]}

Stier, O ^{[1
]}

Strassburg, M ^{[1
]}

Pohl, UW ^{[1
]}

Bimberg, D ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2002年 / 13卷 / 2-4期

关键词：

single quantum dot spectroscopy; quantum-confined Stark effect;

D O I：

10.1016/S1386-9477(01)00535-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Spectral diffusion is an effect often observed in epitaxially grown II-VI quantum dots. It is shown that in such structures spectral diffusion is caused by electric fields generated from charges on the sample surface. The interaction mechanism is a linear quantum-confined Stark effect revealing an electric dipole moment of the zero-dimensional multi-exciton states in the quantum dot. The dipole length of all the observed multi-exciton states is almost the same suggesting a negligible correlation of the electron and hole wave functions caused by a strong vertical confinement. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：269 / 272

页数：4

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