Electrical control of fine-structure splitting in self-assembled quantum dots for entangled photon pair creation

被引：21

作者：

Mar, J. D. ^{[1
]}

Xu, X. L. ^{[1
]}

Sandhu, J. S. ^{[1
]}

Irvine, A. C. ^{[2
]}

Hopkinson, M. ^{[3
]}

Williams, D. A. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Hitachi Cambridge Lab, Cambridge CB3 0HE, England

[2] Univ Cambridge, Cavendish Lab, Microelect Res Ctr, Cambridge CB3 0HE, England

[3] Univ Sheffield, Dept Elect & Elect Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 22期

关键词：

FIELD;

D O I：

10.1063/1.3522655

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The fine-structure splitting delta(1) of the bright exciton doublet in self-assembled InGaAs/GaAs quantum dots is measured as a function of the applied in-plane electric field using time-resolved Kerr rotation. We observe a significant reduction of delta(1) with increasing electric field, suggesting a symmetrizing of the electron and hole wave functions. For sufficiently high fields, it is shown that delta(1) can be made less than the quantum dot homogeneous linewidth gamma, which is calculated using an appropriate model. This may open the way for the electrical control of polarization-entangled photon pair creation through the radiative biexciton cascade. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3522655]

引用

页数：3

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