Details
| Original language | English |
|---|---|
| Article number | 075413 |
| Journal | Physical Review B |
| Volume | 103 |
| Issue number | 7 |
| Early online date | 9 Feb 2021 |
| Publication status | Published - 15 Feb 2021 |
Abstract
We present a 1 GHz-clocked, maximally entangled and on-demand photon pair source based on droplet etched GaAs quantum dots using two-photon excitation. By employing these GaP microlens-enhanced devices in conjunction with their substantial brightness, raw entanglement fidelities of up to 0.95±0.01 and postselected photon indistinguishabilities of up to 0.93±0.01, the suitability for quantum repeater based long range quantum entanglement distribution schemes is shown. Comprehensive investigations of a complete set of polarization selective two-photon correlations facilitate an innovative method to determine the extraction and excitation efficiencies directly, as opposed to commonly employed indirect techniques. Additionally, time-resolved analysis of Hong-Ou-Mandel interference traces reveal an alternative approach to the investigation of pure photon dephasing.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B, Vol. 103, No. 7, 075413, 15.02.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Maximally entangled and gigahertz-clocked on-demand photon pair source
AU - Hopfmann, Caspar
AU - Nie, Weijie
AU - Sharma, Nand Lal
AU - Weigelt, Carmen
AU - Ding, Fei
AU - Schmidt, Oliver G.
N1 - Funding Information: We thank M. Zopf and J. Yang as well as R. Keil for fruitful discussions. We acknowledge funding by the BMBF project Q.link.X under Grant Agreement No. 100362122 and the European Research Council Horizon 2020 project QD-NOMS under Grant Agreement No. 715770.
PY - 2021/2/15
Y1 - 2021/2/15
N2 - We present a 1 GHz-clocked, maximally entangled and on-demand photon pair source based on droplet etched GaAs quantum dots using two-photon excitation. By employing these GaP microlens-enhanced devices in conjunction with their substantial brightness, raw entanglement fidelities of up to 0.95±0.01 and postselected photon indistinguishabilities of up to 0.93±0.01, the suitability for quantum repeater based long range quantum entanglement distribution schemes is shown. Comprehensive investigations of a complete set of polarization selective two-photon correlations facilitate an innovative method to determine the extraction and excitation efficiencies directly, as opposed to commonly employed indirect techniques. Additionally, time-resolved analysis of Hong-Ou-Mandel interference traces reveal an alternative approach to the investigation of pure photon dephasing.
AB - We present a 1 GHz-clocked, maximally entangled and on-demand photon pair source based on droplet etched GaAs quantum dots using two-photon excitation. By employing these GaP microlens-enhanced devices in conjunction with their substantial brightness, raw entanglement fidelities of up to 0.95±0.01 and postselected photon indistinguishabilities of up to 0.93±0.01, the suitability for quantum repeater based long range quantum entanglement distribution schemes is shown. Comprehensive investigations of a complete set of polarization selective two-photon correlations facilitate an innovative method to determine the extraction and excitation efficiencies directly, as opposed to commonly employed indirect techniques. Additionally, time-resolved analysis of Hong-Ou-Mandel interference traces reveal an alternative approach to the investigation of pure photon dephasing.
UR - http://www.scopus.com/inward/record.url?scp=85100632432&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.103.075413
DO - 10.1103/PhysRevB.103.075413
M3 - Article
VL - 103
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 7
M1 - 075413
ER -