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Optically detected magnetic resonance of nitrogen-vacancy centers in diamond using two-photon excitation

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arXiv:2604.15755v1 Announce Type: new Abstract: We demonstrate the use of two-photon excitation for observing the ground state optically detected magnetic resonance (ODMR) of nitrogen-vacancy centers in diamonds at room temperature. An ultrafast femtosecond laser at 1040 nm was used for excitation, while fluorescence signal read out was achieved through a combination of a PMT and a lock-in amplifier. The imaging capability of two-photon excitation fluorescence (2PEF) was utilized to map the dist

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Quantum Physics [Submitted on 17 Apr 2026] Optically detected magnetic resonance of nitrogen-vacancy centers in diamond using two-photon excitation Lam T. Nguyen (1), Khanh Kieu (1) ((1) Wyant College of Optical Sciences, The University of Arizona, Tucson, USA) We demonstrate the use of two-photon excitation for observing the ground state optically detected magnetic resonance (ODMR) of nitrogen-vacancy centers in diamonds at room temperature. An ultrafast femtosecond laser at 1040 nm was used for excitation, while fluorescence signal read out was achieved through a combination of a PMT and a lock-in amplifier. The imaging capability of two-photon excitation fluorescence (2PEF) was utilized to map the distribution of NV centers in a bulk diamond and micro-sized diamonds. For the first time, ODMR traces of the nitrogen-vacancy center are observed with two-photon excitation, providing a promising tool for fast 3D quantum sensing and imaging. Comments: 5 pages including references, 5 captioned figures Subjects: Quantum Physics (quant-ph); Applied Physics (physics.app-ph); Atomic Physics (physics.atom-ph); Optics (physics.optics) Cite as: arXiv:2604.15755 [quant-ph] (or arXiv:2604.15755v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2604.15755 Focus to learn more Submission history From: Lam Nguyen [view email] [v1] Fri, 17 Apr 2026 06:58:35 UTC (767 KB) Access Paper: view license Current browse context: quant-ph < prev | next > new | recent | 2026-04 Change to browse by: physics physics.app-ph physics.atom-ph physics.optics References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)

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