Tip-enhanced quantum-sensing spectroscopy for bright and reconfigurable solid-state single-photon emitters

• URL: http://arxiv.org/abs/2511.21127v1
• Date: Wed, 26 Nov 2025 07:25:11 GMT
• Title: Tip-enhanced quantum-sensing spectroscopy for bright and reconfigurable solid-state single-photon emitters
• Authors: Hyeongwoo Lee, Taeyoung Moon, Hyeonmin Oh, Kijeong Park, Huitae Joo, Milos Toth, Igor Aharonovich, Kyoung-Duck Park,
• Abstract summary: Atom-like defects in hexagonal boron nitride (hBN) provide room-temperature single-photon emission and coherent spin states.<n>Here, we present tip-enhanced quantum-sensing spectroscopy of single-photon emitters in hBN.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Atom-like defects in hexagonal boron nitride (hBN) provide room-temperature single-photon emission and coherent spin states, making them attractive for quantum-computing and -sensing applications. However, their random spatial and spectral characteristics hamper deterministic coupling with nano-optical cavities, limiting their use as bright single-photon sources and sensitive quantum sensors. Here, we present tip-enhanced quantum-sensing spectroscopy of single-photon emitters in hBN. Through precise spatial positioning of individual emitters within tip-cavities with different plasmon resonances, we adaptively control the enhancement rates of both excitation and emission, as well as the single-photon purity. In this way, optimal selection of their relative contributions can effectively reconfigure solid-state single-photon sources, with simultaneous nano-spectroscopic space- and time-resolved analyses. Furthermore, we demonstrate tip-enhanced quantum-sensing with single spin defects through optically detected magnetic resonance (ODMR) experiments in tip-coupled hBN nanoflakes. Our approach provides a unique pathway toward highly-sensitive and deterministic quantum-sensing with room-temperature single-photon emitters.

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