Light-induced spectral diffusion in single self-assembled quantum dots

被引：130

作者：

Robinson, HD ^{[1
]}

Goldberg, BB ^{[1
]}

机构：

[1] Boston Univ, Dept Phys, Boston, MA 02215 USA

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.61.R5086

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Small ensembles of In0.55Al0.45As self-assembled quantum dots have been studied at low temperatures using near-field scanning optical microscopy. We observe spectral diffusion in individual quantum dot luminescence lines. The phenomenon increases in magnitude with optical power density, but is not visible at low powers. We believe the spectral diffusion to be caused by long time-scale trapping and untrapping of charges created by photoionization or thermal ionization in the immediate vicinity of the quantum dots.

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收藏

页码：R5086 / R5089

页数：4

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