Integrated room temperature single-photon source for quantum key distribution

Helen Zhi Jie Zeng; Minh Anh Phan Ngyuen; Xiaoyu Ai; Adam Bennet; Alexander S. Solnstev; Arne Laucht; Ali Al-Juboori; Milos Toth; Richard P. Mildren; Robert Malaney; Igor Aharonovich

doi:10.1364/OL.454450

Integrated room temperature single-photon source for quantum key distribution

Helen Zhi Jie Zeng, Minh Anh Phan Ngyuen, Xiaoyu Ai, Adam Bennet, Alexander S. Solnstev, Arne Laucht, Ali Al-Juboori, Milos Toth, Richard P. Mildren, Robert Malaney, Igor Aharonovich^*

^*Corresponding author for this work

MQ Photonics Research Centre

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

28 Citations (Scopus)

Abstract

High-purity single-photon sources (SPS) that can operate at room temperature are highly desirable for a myriad of applications, including quantum photonics and quantum key distribution. In this work, we realize an ultra-bright solidstate SPS based on an atomic defect in hexagonal boron nitride (hBN) integrated with a solid immersion lens (SIL). The SIL increases the source efficiency by a factor of six, and the integrated system is capable of producing over ten million single photons per second at room temperature. Our results are promising for practical applications of SPS in quantum communication protocols.

Original language	English
Pages (from-to)	1673-1676
Number of pages	4
Journal	Optics Letters
Volume	47
Issue number	7
DOIs	https://doi.org/10.1364/OL.454450
Publication status	Published - 1 Apr 2022

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AU - Zeng, Helen Zhi Jie

AU - Ngyuen, Minh Anh Phan

AU - Ai, Xiaoyu

AU - Bennet, Adam

AU - Solnstev, Alexander S.

AU - Laucht, Arne

AU - Al-Juboori, Ali

AU - Toth, Milos

AU - Mildren, Richard P.

AU - Malaney, Robert

AU - Aharonovich, Igor

PY - 2022/4/1

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N2 - High-purity single-photon sources (SPS) that can operate at room temperature are highly desirable for a myriad of applications, including quantum photonics and quantum key distribution. In this work, we realize an ultra-bright solidstate SPS based on an atomic defect in hexagonal boron nitride (hBN) integrated with a solid immersion lens (SIL). The SIL increases the source efficiency by a factor of six, and the integrated system is capable of producing over ten million single photons per second at room temperature. Our results are promising for practical applications of SPS in quantum communication protocols.

AB - High-purity single-photon sources (SPS) that can operate at room temperature are highly desirable for a myriad of applications, including quantum photonics and quantum key distribution. In this work, we realize an ultra-bright solidstate SPS based on an atomic defect in hexagonal boron nitride (hBN) integrated with a solid immersion lens (SIL). The SIL increases the source efficiency by a factor of six, and the integrated system is capable of producing over ten million single photons per second at room temperature. Our results are promising for practical applications of SPS in quantum communication protocols.

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Integrated room temperature single-photon source for quantum key distribution

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