Affiliation:
1. University of Science and Technology of China
2. Hebei Semiconductor Research Institute
Abstract
Mapping magnetic fields from different materials and structures can provide a powerful means for broad applications of activity probe and feature analysis. Here, we present a high-sensitivity and wide-bandwidth fiber-based quantum magnetometer at the scale of a few hundred micrometers. We propose a fiber-coupled diamond magnetometer. Tracking a pulsed optically detected magnetic resonance spectrum allows a magnetic field sensitivity of
103
pT
/
Hz
and a bandwidth of 2.6 kHz. Additionally, with an approach of coating the diamond surface with silver reflective film, both the fluorescence collection and excitation efficiency are significantly enhanced, and the sensitivity and bandwidth are expected to be further improved to
50
pT
/
Hz
and 4.1 kHz, respectively. Finally, this fiber-based quantum magnetometer is applied as a probe to successfully map the magnetic field induced by the current-carrying copper-wire mesh. Such a stable and compact magnetometer can provide a powerful tool in many areas of physical, chemical, and biological researches.
Funder
National Key Research and Development Program of China
Science Challenge Project
National Natural Science Foundation of China
Anhui Initiative in Quantum Information Technologies
Fundamental Research Funds for the Central Universities
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
13 articles.
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