Optical control of excitons in a pair of quantum dots coupled by the dipole-dipole interaction

被引：178

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 | 2005年 / 94卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.94.137404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate coherent nonlinear-optical control of excitons in a pair of quantum dots (QDs) coupled via dipolar interaction. The single-exciton population in the first QD is controlled by resonant picosecond excitation, giving rise to Rabi oscillations. As a result, the exciton transition in the second QD is spectrally shifted and concomitant Rabi oscillations are observed. We identify coupling between permanent excitonic dipole moments as the dominant interaction mechanism, whereas quasiresonant (Forster) energy transfer is weak. Such control schemes based on dipolar interaction are a prerequisite for realizing scalable quantum logic gates.

引用

页数：4

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