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Solid-state single photon sources are central building blocks in quantum communication networks and on-chip quantum information processing. Atomically thin crystals and layered van-der-Waals materials emerged as possible candidates to emit non-classical states of light. However, the performance of monolayer-based single photon sources has so far been lacking behind state-of-the-art devices based on volume crystals. Here, we implement a single photon source based on an atomically thin sheet of WSe2 coupled to a spectrall tunable optical cavity. We harness the vibrational stability of our open cavity single photon source, which allows us to operate it in a liquid helium-free cryostat without further need for stabilization routines. Its performance is characterized by a high single photon purity with a g(2)(0) value as low as 4.7 ± 0.7 % and a record-high, directly measured first lens brightness of linearly polarized photons as large as 65 ± 4 % as a decisive step towards real-world quantum applications. Interestingly, the high performance of our devices allows us to observe genuine quantum interference phenomena in a Hong-Ou-Mandel experiment. Our results thus demonstrate that open cavities and two-dimensional materials constitute an excellent platform for ultra-bright quantum light sources: the unique properties of such two-dimensional materials and the versatility of open cavities open an inspiring avenue for novel quantum optoelectronic devices.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Single-photon sources, atomically thin crystals, quantum information

刊行年月日: 2023-09-27

出版者: American Chemical Society (ACS)

掲載誌:

• Nano Letters (ISSN: 15306984) vol. 23 issue. 18 p. 8683-8689

研究助成金:

• Volkswagen Foundation SMART
• Comunidad de Madrid 2020T1/IND19785
• Fundaci??n Ram??n Areces ULTRA-BRIGHT
• Ministerio de Ciencia e Innovaci??n PID2020-113445GB-I00
• Deutsche Forschungsgemeinschaft INST 184/220-1 FUGG
• Deutsche Forschungsgemeinschaft SCHN1376 11.1
• Deutsche Forschungsgemeinschaft SCHN1376 14.1
• U.S. Department of Energy DOE-SC0020653
• European Commission 101017733
• European Commission 679288
• National Science Foundation DMR 2111812
• National Science Foundation DMR 2206987
• National Science Foundation ECCS 2052527
• National Science Foundation ECCS 2111812
• National Science Foundation GOALI 2129412
• Carl von Ossietzky Universit??t Oldenburg
• Bundesministerium f??r Bildung und Forschung
• Nieders??chsisches Ministerium f??r Wissenschaft und Kultur DyNano

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/acs.nanolett.3c02584

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更新時刻: 2025-02-26 12:30:53 +0900

MDRでの公開時刻: 2025-02-26 12:30:53 +0900