title: On-demand semiconductor single-photon source with near-unity indistinguishability.
abstract: Single-photon sources based on semiconductor quantum dots offer distinct advantages for quantum information, including a scalable solid-state platform, ultrabrightness and interconnectivity with matter qubits. A key prerequisite for their use in optical quantum computing and solid-state networks is a high level of efficiency and indistinguishability. Pulsed resonance fluorescence has been anticipated as the optimum condition for the deterministic generation of high-quality photons with vanishing effects of dephasing. Here, we generate pulsed single photons on demand from a single, microcavity-embedded quantum dot under s-shell excitation with 3 ps laser pulses. The π pulse-excited resonance-fluorescence photons have less than 0.3% background contribution and a vanishing two-photon emission probability. Non-postselective Hong-Ou-Mandel interference between two successively emitted photons is observed with a visibility of 0.97(2), comparable to trapped atoms and ions. Two single photons are further used to implement a high-fidelity quantum controlled-NOT gate.
authors: Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors: Yu-Ming
authors: YM
authors: He
authors: Yu
authors: Y
authors: He
authors: Yu-Jia
authors: YJ
authors: Wei
authors: Dian
authors: D
authors: Wu
authors: Mete
authors: M
authors: Atatüre
authors: Christian
authors: C
authors: Schneider
authors: Sven
authors: S
authors: Höfling
authors: Martin
authors: M
authors: Kamp
authors: Chao-Yang
authors: CY
authors: Lu
authors: Jian-Wei
authors: JW
authors: Pan
mesh_terms: D005453:Fluorescence; D007834:Lasers; D008027:Light; D017785:Photons; D045663:Quantum Dots
references: Opt Express. 2005 Oct 3;13(20):7772-8
references: 19498805
references: Nature. 2010 Jul 8;466(7303):217-20
references: 20613838
references: Phys Rev Lett. 2006 May 12;96(18):180501
references: 16712351
references: Phys Rev Lett. 2001 Feb 19;86(8):1502-5
references: 11290178
references: Phys Rev Lett. 2005 Nov 18;95(21):210506
references: 16384126
references: Phys Rev Lett. 2005 Nov 18;95(21):210504
references: 16384124
references: Phys Rev Lett. 1987 Nov 2;59(18):2044-2046
references: 10035403
references: Phys Rev Lett. 2012 Jan 6;108(1):017401
references: 22304288
references: Phys Rev Lett. 2010 Oct 22;105(17):177402
references: 21231078
references: Science. 2000 Dec 22;290(5500):2282-5
references: 11125136
references: Nature. 2002 Aug 8;418(6898):612-4
references: 12167853
references: Phys Rev Lett. 2004 Jan 23;92(3):037904
references: 14753912
references: Phys Rev Lett. 2005 Nov 18;95(21):210505
references: 16384125
references: Science. 2008 May 9;320(5877):769-72
references: 18467584
references: Nature. 2008 Jun 19;453(7198):1023-30
references: 18563153
references: Phys Rev Lett. 2010 Jul 16;105(3):033601
references: 20867763
references: Phys Rev Lett. 2008 Jan 11;100(1):017401
references: 18232819
references: Phys Rev Lett. 2008 May 23;100(20):207405
references: 18518580
references: Nature. 2006 Apr 6;440(7085):779-82
references: 16598253
references: Phys Rev Lett. 2010 Apr 2;104(13):137401
references: 20481912
references: Phys Rev Lett. 2009 Oct 16;103(16):167402
references: 19905722
references: Phys Rev Lett. 2012 Mar 9;108(10):107401
references: 22463453
references: Nature. 2003 Nov 20;426(6964):264-7
references: 14628045
references: Phys Rev Lett. 2007 Nov 2;99(18):187402
references: 17995437
references: Phys Rev Lett. 2009 Sep 11;103(11):113602
references: 19792371
references: Phys Rev Lett. 2005 Jun 10;94(22):223602
references: 16090394
references: Phys Rev Lett. 2005 Apr 29;94(16):160504
references: 15904203
references: Phys Rev Lett. 2012 Mar 2;108(9):093602
references: 22463634
references: Nature. 2002 Oct 10;419(6907):594-7
references: 12374958
references: Phys Rev Lett. 2002 Aug 5;89(6):067901
references: 12190611
references: Phys Rev Lett. 2005 Jul 15;95(3):030504
references: 16090729
references: Science. 2004 Mar 26;303(5666):1992-4
references: 14988512