A solid-state source of strongly entangled photon pairs with high brightness and indistinguishability

被引：397

作者：

Liu, Jin ^{[1
]}

Su, Rongbin ^{[1
]}

Wei, Yuming ^{[1
]}

Yao, Beimeng ^{[1
]}

da Silva, Saimon Filipe Covre ^{[2
]}

Yu, Ying ^{[3
]}

Iles-Smith, Jake ^{[4
]}

Srinivasan, Kartik ^{[5
]}

Rastelli, Armando ^{[2
]}

Li, Juntao ^{[1
]}

Wang, Xuehua ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Phys, State Key Lab Optoelect Mat & Technol, Guangzhou, Guangdong, Peoples R China

[2] Johannes Kepler Univ Linz, Inst Semicond & Solid State Phys, Linz, Austria

[3] Sun Yat Sen Univ, Sch Elect & Informat Technol, State Key Lab Optoelect Mat & Technol, Guangzhou, Guangdong, Peoples R China

[4] Univ Sheffield, Sch Phys & Astron, Sheffield, S Yorkshire, England

[5] Natl Inst Stand & Technol, Microsyst & Nanotechnol Div, Gaithersburg, MD 20899 USA

来源：

NATURE NANOTECHNOLOGY | 2019年 / 14卷 / 06期

基金：

奥地利科学基金会; 国家重点研发计划;

关键词：

QUANTUM-DOT; EFFICIENT;

D O I：

10.1038/s41565-019-0435-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The generation of high-quality entangled photon pairs has been a long-sought goal in modern quantum communication and computation. So far, the most widely used entangled photon pairs have been generated from spontaneous parametric down-conversion (SPDC), a process that is intrinsically probabilistic and thus relegated to a regime of low rates of pair generation. In contrast, semiconductor quantum dots can generate triggered entangled photon pairs through a cascaded radiative decay process and do not suffer from any fundamental trade-off between source brightness and multi-pair generation. However, a source featuring simultaneously high photon extraction efficiency, high degree of entanglement fidelity and photon indistinguishability has been lacking. Here, we present an entangled photon pair source with high brightness and indistinguishability by deterministically embedding GaAs quantum dots in broadband photonic nanostructures that enable Purcell-enhanced emission. Our source produces entangled photon pairs with a pair collection probability of up to 0.65(4) (single-photon extraction efficiency of 0.85(3)), entanglement fidelity of 0.88(2), and indistinguishabilities of 0.901(3) and 0.903(3) (brackets indicate uncertainty on last digit). This immediately creates opportunities for advancing quantum photonic technologies.

引用

页码：586 / +

页数：9

共 57 条

[1] Device-independent security of quantum cryptography against collective attacks [J].

Acin, Antonio ;

Brunner, Nicolas ;

Gisin, Nicolas ;

Massar, Serge ;

Pironio, Stefano ;

Scarani, Valerio .

PHYSICAL REVIEW LETTERS, 2007, 98 (23)

[2] Entangled photon pairs from semiconductor quantum dots [J].

Akopian, N ;

Lindner, NH ;

Poem, E ;

Berlatzky, Y ;

Avron, J ;

Gershoni, D ;

Gerardot, BD ;

Petroff, PM .

PHYSICAL REVIEW LETTERS, 2006, 96 (13)

[3] Near-Unity Coupling Efficiency of a Quantum Emitter to a Photonic Crystal Waveguide [J].

Arcari, M. ;

Sollner, I. ;

Javadi, A. ;

Hansen, S. Lindskov ;

Mahmoodian, S. ;

Liu, J. ;

Thyrrestrup, H. ;

Lee, E. H. ;

Song, J. D. ;

Stobbe, S. ;

Lodahl, P. .

PHYSICAL REVIEW LETTERS, 2014, 113 (09)

[4] Regulated and entangled photons from a single quantum dot [J].

Benson, O ;

Santori, C ;

Pelton, M ;

Yamamoto, Y .

PHYSICAL REVIEW LETTERS, 2000, 84 (11) :2513-2516

[5]

Bouwmeester D., 2000, The Physics of Quantum Information

[6] Highly-efficient extraction of entangled photons from quantum dots using a broadband optical antenna [J].

Chen, Yan ;

Zopf, Michael ;

Keil, Robert ;

Ding, Fei ;

Schmidt, Oliver G. .

NATURE COMMUNICATIONS, 2018, 9

[7] Wavelength-tunable entangled photons from silicon-integrated III-V quantum dots [J].

Chen, Yan ;

Zhang, Jiaxiang ;

Zopf, Michael ;

Jung, Kyubong ;

Zhang, Yang ;

Keil, Robert ;

Ding, Fei ;

Schmidt, Oliver G. .

NATURE COMMUNICATIONS, 2016, 7

[8]

Chung TH, 2016, NAT PHOTONICS, V10, P782, DOI [10.1038/NPHOTON.2016.203, 10.1038/nphoton.2016.203]

[9] A highly efficient single-photon source based on a quantum dot in a photonic nanowire [J].

Claudon, Julien ;

Bleuse, Joel ;

Malik, Nitin Singh ;

Bazin, Maela ;

Jaffrennou, Perine ;

Gregersen, Niels ;

Sauvan, Christophe ;

Lalanne, Philippe ;

Gerard, Jean-Michel .

NATURE PHOTONICS, 2010, 4 (03) :174-177

[10] A circular dielectric grating for vertical extraction of single quantum dot emission [J].

Davanco, M. ;

Rakher, M. T. ;

Schuh, D. ;

Badolato, A. ;

Srinivasan, K. .

APPLIED PHYSICS LETTERS, 2011, 99 (04)

← 1 2 3 4 5 6 →