Magnetic field sensing via optically detected magnetic resonance and spin relaxometry using nitrogen vacancies in nanodiamonds

Gary R. Lander; Scott Crawford; Hari P. Paudel; Jeffrey Wuenschell; Matthew M. Brister; Michael P. Buric; Ruishu Wright; Yuhua Duan

doi:10.1117/12.3014019

7 June 2024 Magnetic field sensing via optically detected magnetic resonance and spin relaxometry using nitrogen vacancies in nanodiamonds

Gary R. Lander, Scott Crawford, Hari P. Paudel, Jeffrey Wuenschell, Matthew M. Brister, Michael P. Buric, Ruishu Wright, Yuhua Duan

Author Affiliations +

Proceedings Volume 13028, Quantum Information Science, Sensing, and Computation XVI; 1302804 (2024) https://doi.org/10.1117/12.3014019
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

Quantum sensing is broadly defined as the use of quantum materials, quantum coherence, and/or quantum entanglement to measure physical quantities and/or to enhance the sensitivity of classical analytical measurements. Certain materials exhibit interesting quantum properties that have the potential to be utilized in quantum sensing applications. One such quantum property is electronic spin, which is utilized in this work. Here, we built a custom apparatus capable of conducting both optically detected magnetic resonance (ODMR) and spin relaxometry. The quantum material investigated was an ensemble of nitrogen vacancies (NV) in nanodiamonds. We have characterized the system and measured ODMR spectra at different applied DC magnetic fields and observed the expected splitting of the resonances due the Zeeman effect. We also have measured the spin relaxation times for two different powers of the applied AC magnetic field. The lower power dataset exhibited expected exponential temporal dependence of the relaxation of a modified spin state, whereas the higher power dataset exhibited stretched exponential dependence of the evolution of the modified spin state, indicating the presence of high-power phenomena that emerge that retard the relaxation of the spin state.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Gary R. Lander, Scott Crawford, Hari P. Paudel, Jeffrey Wuenschell, Matthew M. Brister, Michael P. Buric, Ruishu Wright, and Yuhua Duan "Magnetic field sensing via optically detected magnetic resonance and spin relaxometry using nitrogen vacancies in nanodiamonds", Proc. SPIE 13028, Quantum Information Science, Sensing, and Computation XVI, 1302804 (7 June 2024); https://doi.org/10.1117/12.3014019

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