Cavity-assisted emission of polarization-entangled photons from biexcitons in quantum dots with fine-structure splitting

被引：41

作者：

Schumacher, Stefan ^{[1
,2
]}

Foerstner, Jens ^{[1
,2
]}

Zrenner, Artur ^{[1
,2
]}

Florian, Matthias ^{[3
]}

Gies, Christopher ^{[3
]}

Gartner, Paul ^{[3
,4
]}

Jahnke, Frank ^{[3
]}

机构：

[1] Univ Paderborn, Dept Phys, D-33098 Paderborn, Germany

[2] Univ Paderborn, Ctr Optoelect & Photon Paderborn CeOPP, D-33098 Paderborn, Germany

[3] Univ Bremen, Inst Theoret Phys, D-28334 Bremen, Germany

[4] Natl Inst Mat Phys, Bucharest, Romania

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 05期

关键词：

D O I：

10.1364/OE.20.005335

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the quantum properties and statistics of photons emitted by a quantum-dot biexciton inside a cavity. In the biexciton-exciton cascade, fine-structure splitting between exciton levels degrades polarization-entanglement for the emitted pair of photons. However, here we show that the polarization-entanglement can be preserved in such a system through simultaneous emission of two degenerate photons into cavity modes tuned to half the biexciton energy. Based on detailed theoretical calculations for realistic quantum-dot and cavity parameters, we quantify the degree of achievable entanglement. (C) 2012 Optical Society of America

引用

页码：5335 / 5342

页数：8

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