Abstract

A method for enhancement of the sensitivity of a spin sensor based on an ensemble of nitrogen vacancy (NV) color centers was demonstrated. Gold nanoparticles (NPs) were deposited on the bulk diamond, which had NV centers distributed on its surface. The experimental results demonstrate that, when using this simple method, plasmon enhancement of the deposited gold NPs produces an improvement of $\sim 10$ times in the quantum efficiency and has also improved the signal-to-noise ratio by approximately $\sim 2.5$ times. It was also shown that more electrons participated in the spin sensing process, leading to an improvement in the sensitivity of approximately seven times; this has been proved by Rabi oscillation and optical detection of magnetic resonance (ODMR) measurements. The proposed method has proved to be a more efficient way to design an ensemble of NV centers-based sensors; because the result increases in the number of NV centers, the quantum efficiency and the contrast ratio could greatly increase the device’s sensitivity.

© 2017 Optical Society of America

Laser-induced heating in a high-density ensemble of nitrogen-vacancy centers in diamond and its effects on quantum sensing

Dewen Duan, Vinaya Kumar Kavatamane, Sri Ranjini Arumugam, Ganesh Rahane, Guan-Xiang Du, Yan-Kai Tzeng, Huan-Cheng Chang, and Gopalakrishnan Balasubramanian
Opt. Lett. 44(11) 2851-2854 (2019)

Optically induced static magnetic field in the ensemble of nitrogen-vacancy centers in diamond

Farid Kalhor, Noah F. Opondo, Shoaib Mahmud, Leif Bauer, Li-Ping Yang, Sunil A. Bhave, and Zubin Jacob
Opt. Lett. 47(13) 3347-3350 (2022)

Stimulated fluorescence quenching in nitrogen–vacancy centers of diamond: temperature effects

S. M. Blakley, A. B. Fedotov, J. Becker, N. Altangerel, I. V. Fedotov, P. Hemmer, M. O. Scully, and A. M. Zheltikov
Opt. Lett. 41(9) 2077-2080 (2016)

Diamond-optic enhanced photon collection efficiency for sensing with nitrogen-vacancy centers

Muhib Omar, Andreas Conta, Andreas Westerhoff, Raphael Hasse, Georgios Chatzidrosos, Dmitry Budker, and Arne Wickenbrock
Opt. Lett. 48(10) 2512-2514 (2023)

Coherent control of a nitrogen-vacancy center spin ensemble with a diamond mechanical resonator

E. R. MacQuarrie, T. A. Gosavi, A. M. Moehle, N. R. Jungwirth, S. A. Bhave, and G. D. Fuchs
Optica 2(3) 233-238 (2015)