Related papers: Realization of high-dynamic-range broadband magnetic-field sensing with ensemble nitrogen-vacancy centers in diamond

Realization of high-dynamic-range broadband magnetic-field sensing with ensemble nitrogen-vacancy centers in diamond

URL: http://arxiv.org/abs/2209.11360v1
Date: Fri, 23 Sep 2022 01:18:12 GMT
Title: Realization of high-dynamic-range broadband magnetic-field sensing with ensemble nitrogen-vacancy centers in diamond
Authors: Cao Wang, Qihui Liu, Yuqiang Hu, Fei Xie, Krishangi Krishna, Nan Wang, Lihao Wang, Yang Wang, Kimani C. Toussaint Jr, Jiangong Cheng, Hao Chen, and Zhenyu Wu
Abstract summary: We present a new magnetometry method integrating an ensemble of nitrogen-vacancy centers in a single-crystal diamond. The NV-center spin resonance frequency is tracked using a closed-loop frequency locked technique with fast frequency hopping to achieve a 10 kHz measurement bandwidth. This technique exhibits an extended dynamic range subjected to the working bandwidth of the microwave source.
Score: 17.22352618695417
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We present a new magnetometry method integrating an ensemble of nitrogen-vacancy (NV) centers in a single-crystal diamond with an extended dynamic range for monitoring the fast changing magnetic-field. The NV-center spin resonance frequency is tracked using a closed-loop frequency locked technique with fast frequency hopping to achieve a 10 kHz measurement bandwidth, thus, allowing for the detection of fast changing magnetic signals up to 0.723 T/s.This technique exhibits an extended dynamic range subjected to the working bandwidth of the microwave source. This extended dynamic range can reach up to 4.3 mT, which is 86 times broader than the intrinsic dynamic range. The essential components for NV spin control and signal processing such as signal generation, microwave frequency control, data processing and readout are integrated in a board-level system. With this platform, we demonstrate broadband magnetometry with an optimized sensitivity of 4.2 nT-Hz-1/2. This magnetometry method has the potential to be implemented in a multichannel frequency locked vector magnetometer suitable for a wide range of practical applications such as magnetocardiography and high-precision current sensors.

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