Bonn 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 48: Poster – Quantum Optics, Technologies, and Optomechanics
Q 48.28: Poster
Mittwoch, 12. März 2025, 17:00–19:00, Tent
Exploiting NV Center Spin Dynamics for Low-Temperature All-Optical Thermometry — •Jonas Homrighausen1, Matthias Hollmann1, Ludwig Horsthemke2, Peter Glösekötter2, and Markus Gregor1 — 1Department of Engineering Physics, FH Münster — 2Department of Electrical Engineering and Computer Science, FH Münster
The nitrogen vacancy center in diamond has been established as a promising tool to conduct temperature measurements down to the nanoscale for biomedical applications, microelectronics and material analysis. The protocols typically rely on either the spin-dependent fluorescence of the NV quantum system, manipulated by microwave frequencies [1], or the prominence of the zero-phonon line in the fluorescence spectrum [2]. The latter, all-optical approach however is sensitive to fluctuations in the fluorescence intensity and relies on spectral analysis, increasing the complexity.
Here, we explore an all-optical approach that avoids microwave-based spin manipulation and reduces susceptibility to intensity fluctuations. This method exploits the temperature dependent spin dynamics of the NV ground state in bulk material. We assess sensor performance as a temperature probe and discuss the sensitivity of this method. These advancements promise robust and reliable temperature measurements in harsh environments and offer seamless integration into all-optical NV magnetometers.
[1] Fujiwara, M. et al. Sci. Adv. 6, eaba9636 (2020).
[2] Fukami, M. et al. Phys. Rev. Appl. 12, 014042 (2019).
Keywords: NV Center; Spin Dynamics; Thermometry; Quantum Sensing