Quantum light emission of two lateral tunnel-coupled (In,Ga)As/GaAs quantum dots controlled by a tunable static electric field

被引：171

作者：

Beirne, GJ

Hermannstädter, C

Wang, L

Rastelli, A

Schmidt, OG

Michler, P

机构：

[1] Univ Stuttgart, Phys Inst 5, D-70569 Stuttgart, Germany

[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.96.137401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Lateral quantum coupling between two self-assembled (In,Ga)As quantum dots has been observed. Photon statistics measurements between the various excitonic and biexcitonic transitions of these lateral quantum dot molecules display strong antibunching confirming the presence of coupling. Furthermore, we observe an anomalous exciton Stark shift with respect to static electric field. A simple model indicates that the lateral coupling is due to electron tunneling between the dots when the ground states are in resonance. The electron probability can then be shifted to either dot and the system can be used to create a wavelength-tunable single-photon emitter by simply applying a voltage.

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页数：4

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