Integrated Room Temperature Single Photon Source for Quantum Key Distribution

2022/01/28 by Helen Zhi Jie Zeng, Zeng, Helen Zhi Jie, Minh Anh Phan Ngyuen +19 · 3 citations
Computer Science · Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Optics (physics.optics) #Photonic and Optical Devices #Quantum Information and Cryptography #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.2201.11882

openalex publication_date 2022/01/28 · openalex created_date 2022/07/23 · openalex updated_date 2026/07/28

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 realise an ultra-bright solid-state 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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