Optical stark effect in a quantum dot: Ultrafast control of single exciton polarizations

被引：121

作者：

Unold, T ^{[1
]}

Mueller, K

Lienau, C

Elsaesser, T

Wieck, AD

机构：

[1] Max Born Inst Nichtlineare Opt & Kurzzeitspektros, D-12489 Berlin, Germany

[2] Ruhr Univ Bochum, Lehrstuhl Angew Festkorperphys, D-44870 Bochum, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.92.157401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first experimental study of the optical Stark effect in single semiconductor quantum dots (QD). For below band gap excitation, two-color pump-probe spectra show dispersive line shapes caused by a light-induced blueshift of the excitonic resonance. The line shape depends strongly on the excitation field strength and is determined by the pump-induced phase shift of the coherent QD polarization. Transient spectral oscillations can be understood as rotations of the QD polarization phase with negligible population change. Ultrafast control of the QD polarization is demonstrated.

引用

页码：157401 / 1

页数：4

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