Time-bin entangled photon pairs from quantum dots embedded in a self-aligned cavity

被引：10

作者：

Gines, Laia ^{[1
,2
,3
]}

Pepe, Carlo ^{[3
]}

Gonzales, Junior ^{[3
]}

Gregersen, Niels ^{[4
]}

Hoefling, Sven ^{[1
,2
]}

Schneider, Christian ^{[1
,2
,5
]}

Predojevic, Ana ^{[3
]}

机构：

[1] Univ Wurzburg, Tech Phys, Phys Inst, D-97074 Wurzburg, Germany

[2] Univ Wurzburg, Wurzburg Dresden Cluster Excellence Ct Qmat, D-97074 Wurzburg, Germany

[3] Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden

[4] Mchn Univ Denmark, Dept Photon Engn, DTU Foton, Bldg 343, DK-2800 Lyngby, Denmark

[5] Carl von Ossietzky Univ Oldenburg, Inst Phys, D-26129 Oldenburg, Germany

来源：

OPTICS EXPRESS | 2021年 / 29卷 / 03期

基金：

瑞典研究理事会;

关键词：

D O I：

10.1364/OE.411021

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We introduce a scalable photonic platform that enables efficient generation of entangled photon pairs from a semiconductor quantum dot. Our system, which is based on a self-aligned quantum dot- micro-cavity structure, erases the need for complex steps of lithography and nanofabrication. We experimentally show collection efficiency of 0.17 combined with a Purcell enhancement of up to 1.7. We harness the potential of our device to generate photon pairs entangled in time bin, reaching a fidelity of 0.84(5) with the maximally entangled state. The achieved pair collection efficiency is 4 times larger than the state-of-the art for this application. The device, which theoretically supports pair extraction efficiencies of nearly 0.5 is a promising candidate for the implementation of bright sources of time-bin, polarization- and hyper entangled photon pairs in a straightforward manner. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：4174 / 4180

页数：7

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