High-resolution vector microwave magnetometry based on solid-state spins in diamond

• DOI: 10.1038/ncomms7631
• Publication Date: 2015-03-23T13:07:35Z
• Authors: Pengfei Wang; Zhenheng Yuan; Pu Huang; Xing Rong; Mengqi Wang; Xiangkun Xu; Changkui Duan; Chenyong Ju; Fazhan Shi; Jiangfeng Du
• Keywords: 0103 physical sciences; 01 natural sciences; Article

AbstractThe measurement of the microwave field is crucial for many developments in microwave technology and related applications. However, measuring microwave fields with high sensitivity and spatial resolution under ambient conditions remains elusive. In this work, we propose and experimentally demonstrate a scheme to measure both the strength and orientation of the microwave magnetic field by utilizing the quantum coherent dynamics of nitrogen vacancy centres in diamond. An angular resolution of 5.7 mrad and a sensitivity of 1.0 μT Hz−1/2are achieved at a microwave frequency of 2.6000 GHz, and the microwave magnetic field vectors generated by a copper wire are precisely reconstructed. The solid-state microwave magnetometry with high resolution and wide frequency range that can work under ambient conditions proposed here enables unique potential applications over other state-of-art microwave magnetometry.