Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster – Photonics
Q 40.4: Poster
Wednesday, March 4, 2026, 17:00–19:00, Philo 1. OG
Cryogenic-Temperature ODMR Analysis of Nitrogen-Vacancy Centers in Nanodiamonds — •Wanrong Li1, Keisuke Oshimi2, Masazumi Fujiwara2, and Oliver Benson1 — 1Humboldt-Universität, Berlin, Germany — 2Okayama University, Okayama, Japan
Nitrogen-Vacancy (NV) defect centers in diamond have demonstrated remarkable quantum properties and have enabled diverse applications in quantum technology and sensing. NV centers in nanodiamond exhibit temperature-dependent shifts in their zero-field splitting (ZFS), but the underlying mechanisms may differ from those observed in bulk diamond [1] due to surface effects [2], lattice strain, impurity-induced perturbations, and other nanoscale mechanisms. In this work, we investigate the Optically Detected Magnetic Resonance (ODMR) of ensemble NV centers in nanodiamond over a range of cryogenic temperatures. These measurements enable direct probing and modeling of the temperature-dependent NV zero-field splitting. Looking ahead, we aim to investigate fundamental physical phenomena in nanodiamond using single NV defects.
References
[1] M. C. Cambria et al., Physically motivated analytical expression for the temperature dependence of the zero-field splitting of the nitrogen-vacancy center in diamond, Phys. Rev. B 108, L180102 (2023).
[2] M. Sow et al., Millikelvin intracellular nanothermometry with nanodiamonds, Adv. Sci. 12, e11670 (2025).
Keywords: NV center; nanodiamond; cryogenic temperature