Resonance fluorescence from an atomic-quantum-memory compatible single photon source based on GaAs droplet quantum dots

Laxmi Narayan Tripathi; Yu-Ming He; Łukasz Dusanowski; Piotr Andrzej Wroński; Chao-Yang Lu; Christian Schneider; Sven Höfling

doi:10.1063/1.5034402

Resonance fluorescence from an atomic-quantum-memory compatible single photon source based on GaAs droplet quantum dots

Laxmi Narayan Tripathi, Yu-Ming He, Łukasz Dusanowski, Piotr Andrzej Wroński, Chao-Yang Lu, Christian Schneider, Sven Höfling

Research output: Contribution to journal › Article › peer-review

Abstract

Single photon sources, which are compatible with quantum memories are an important component of quantum networks. In this article, we show optical investigations on isolated GaAs/Al_0.25Ga_0.75As quantum dots grown via droplet epitaxy, which emit single photons on resonance with the Rb-87-D₂ line (780 nm). Under continuous wave resonant excitation conditions, we observe bright, clean and narrowband resonance fluorescence emission from such a droplet quantum dot. Furthermore, the second-order correlation measurement
clearly demonstrates the single photon emission from this resonantly driven transition. Spectrally resolved resonance fluorescence of a similar quantum dot yields a linewidth as narrow as 660 MHz (2.7 μeV ), which corresponds to a coherence time of 0.482 ns. The observed linewidth is the smallest reported so far for strain free GaAs quantum dots grown via the droplet method. We believe that this single photon source can be a prime candidate for applications in optical quantum networks.

Original language	English
Article number	021102
Number of pages	5
Journal	Applied Physics Letters
Volume	113
Issue number	2
DOIs	https://doi.org/10.1063/1.5034402
Publication status	Published - 10 Jul 2018

Keywords

Single photon source
Quantum memory
Droplet quantum dots
Resonance fluorescence
Droplet epitaxy

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APL_DropletQDs__Revised
© 2018 The Author(s). Published by AIP Publishing. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1063/1.5034402
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Cite this

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title = "Resonance fluorescence from an atomic-quantum-memory compatible single photon source based on GaAs droplet quantum dots",

abstract = "Single photon sources, which are compatible with quantum memories are an important component of quantum networks. In this article, we show optical investigations on isolated GaAs/Al0.25Ga0.75As quantum dots grown via droplet epitaxy, which emit single photons on resonance with the Rb-87-D2 line (780 nm). Under continuous wave resonant excitation conditions, we observe bright, clean and narrowband resonance fluorescence emission from such a droplet quantum dot. Furthermore, the second-order correlation measurementclearly demonstrates the single photon emission from this resonantly driven transition. Spectrally resolved resonance fluorescence of a similar quantum dot yields a linewidth as narrow as 660 MHz (2.7 μeV ), which corresponds to a coherence time of 0.482 ns. The observed linewidth is the smallest reported so far for strain free GaAs quantum dots grown via the droplet method. We believe that this single photon source can be a prime candidate for applications in optical quantum networks.",

keywords = "Single photon source, Quantum memory, Droplet quantum dots, Resonance fluorescence, Droplet epitaxy",

author = "Tripathi, {Laxmi Narayan} and Yu-Ming He and {\L}ukasz Dusanowski and Wro{\'n}ski, {Piotr Andrzej} and Chao-Yang Lu and Christian Schneider and Sven H{\"o}fling",

note = "This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 721394. We furthermore gratefully acknowledge support by the State of Bavaria.",

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doi = "10.1063/1.5034402",

language = "English",

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T1 - Resonance fluorescence from an atomic-quantum-memory compatible single photon source based on GaAs droplet quantum dots

AU - Tripathi, Laxmi Narayan

AU - He, Yu-Ming

AU - Dusanowski, Łukasz

AU - Wroński, Piotr Andrzej

AU - Lu, Chao-Yang

AU - Schneider, Christian

AU - Höfling, Sven

N1 - This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 721394. We furthermore gratefully acknowledge support by the State of Bavaria.

PY - 2018/7/10

Y1 - 2018/7/10

N2 - Single photon sources, which are compatible with quantum memories are an important component of quantum networks. In this article, we show optical investigations on isolated GaAs/Al0.25Ga0.75As quantum dots grown via droplet epitaxy, which emit single photons on resonance with the Rb-87-D2 line (780 nm). Under continuous wave resonant excitation conditions, we observe bright, clean and narrowband resonance fluorescence emission from such a droplet quantum dot. Furthermore, the second-order correlation measurementclearly demonstrates the single photon emission from this resonantly driven transition. Spectrally resolved resonance fluorescence of a similar quantum dot yields a linewidth as narrow as 660 MHz (2.7 μeV ), which corresponds to a coherence time of 0.482 ns. The observed linewidth is the smallest reported so far for strain free GaAs quantum dots grown via the droplet method. We believe that this single photon source can be a prime candidate for applications in optical quantum networks.

AB - Single photon sources, which are compatible with quantum memories are an important component of quantum networks. In this article, we show optical investigations on isolated GaAs/Al0.25Ga0.75As quantum dots grown via droplet epitaxy, which emit single photons on resonance with the Rb-87-D2 line (780 nm). Under continuous wave resonant excitation conditions, we observe bright, clean and narrowband resonance fluorescence emission from such a droplet quantum dot. Furthermore, the second-order correlation measurementclearly demonstrates the single photon emission from this resonantly driven transition. Spectrally resolved resonance fluorescence of a similar quantum dot yields a linewidth as narrow as 660 MHz (2.7 μeV ), which corresponds to a coherence time of 0.482 ns. The observed linewidth is the smallest reported so far for strain free GaAs quantum dots grown via the droplet method. We believe that this single photon source can be a prime candidate for applications in optical quantum networks.

KW - Single photon source

KW - Quantum memory

KW - Droplet quantum dots

KW - Resonance fluorescence

KW - Droplet epitaxy

U2 - 10.1063/1.5034402

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JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

Resonance fluorescence from an atomic-quantum-memory compatible single photon source based on GaAs droplet quantum dots

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