Related papers: Multiplexed sensing of magnetic field and temperature in real time using a nitrogen vacancy spin ensemble in diamond

Multiplexed sensing of magnetic field and temperature in real time using a nitrogen vacancy spin ensemble in diamond

URL: http://arxiv.org/abs/2104.12211v2
Date: Wed, 1 Dec 2021 16:00:00 GMT
Title: Multiplexed sensing of magnetic field and temperature in real time using a nitrogen vacancy spin ensemble in diamond
Authors: Jeong Hyun Shim, Seong-Joo Lee, Santosh Ghimire, Ju Il Hwang, Kang Geol Lee, Kiwoong Kim, Matthew J. Turner, Connor A. Hart, Ronald L. Walsworth, Sangwon Oh
Abstract summary: Nitrogen-Vacancy (NV) spin in diamond is a versatile quantum sensor. We demonstrate a multiplexed sensing of magnetic field and temperature.
Score: 1.015785232738621
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Nitrogen-Vacancy (NV) spin in diamond is a versatile quantum sensor, being able to measure physical quantities such as magnetic field, electric field, temperature, and pressure. In the present work, we demonstrate a multiplexed sensing of magnetic field and temperature. The dual frequency driving technique we employ here is based on frequency-division multiplexing, which enables sensing both measurables in real time. The pair of NV resonance frequencies for dual frequency driving must be selected to avoid coherent population trapping of NV spin states. With an enhanced optical collection efficiency higher than 50 $\%$ and a type 1b diamond crystal with natural abundance $^{13}$C spins, we achieve sensitivities of about 70 pT/$\sqrt{\mathrm{Hz}}$ and 25 $\mu$K/$\sqrt{\mathrm{Hz}}$ simultaneously. A high isolation factor of 34 dB in NV thermometry signal against magnetic field was obtained, and we provide a theoretical description for the isolation factor. This work paves the way for extending the application of NV quantum diamond sensors into more demanding conditions.

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