Scholarlink

<p>Magnetometers based on nitrogen-vacancy (NV) centers in diamonds have been widely studied. With the use of purified diamond and magnetic flux concentrators (MFCs), the sensitivity of magnetic field measurement has been improved to the subpico-tesla level. However, diamond magnetometers face the challenge of achieving high sensing performance after integration. Here, we demonstrate an integrated fiber-coupled diamond magnetometer based on an MFC with both high sensitivity and a wide dynamic range. We sandwiched a nitrogen-doped diamond film of [111] crystal orientation between the two MFCs. With the polarization direction of the pump laser perpendicular to the NV center axis, the signal-to-noise ratio and its linearity with the magnetic field are enhanced. We demonstrate a sensitivity of 50 <InlineEquation ID="IEq1"><EquationSource Format="TEX">\({{\rm{pT}}}/\sqrt{{{\rm{Hz}}}}\)</EquationSource><EquationSource Format="MATHML"><math><mi mathvariant="normal">pT</mi><mo>/</mo><msqrt><mrow><mi mathvariant="normal">Hz</mi></mrow></msqrt></math></EquationSource></InlineEquation>@0.01 Hz and 390(172) <InlineEquation ID="IEq2"><EquationSource Format="TEX">\({{\rm{fT}}}/\sqrt{{{\rm{Hz}}}}\)</EquationSource><EquationSource Format="MATHML"><math><mi mathvariant="normal">fT</mi><mo>/</mo><msqrt><mrow><mi mathvariant="normal">Hz</mi></mrow></msqrt></math></EquationSource></InlineEquation>@&#xa0;&gt;&#xa0;3 Hz while with a detection range of about 4 times the Earth’s magnetic field. This work demonstrates the feasibility of portable, highly sensitive diamond magnetometers that maintain a large dynamic range in various natural environments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Integrated fiberized diamond magnetometer with high sensitivity and dynamic range by magnetic flux concentrators

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月27日

查看全文
  • Gao Xue-Dong,
  • Zhang Shao-Chun,
  • Liu Yong,
  • Yu Cui,
  • Mao Ze-Kun,
  • Jiang Wang,
  • Shan Long-Kun,
  • Zhou Xing-Ye,
  • Chen Xiang-Dong,
  • Sun Fang-Wen,
  • Feng Zhi-Hong

摘要

Magnetometers based on nitrogen-vacancy (NV) centers in diamonds have been widely studied. With the use of purified diamond and magnetic flux concentrators (MFCs), the sensitivity of magnetic field measurement has been improved to the subpico-tesla level. However, diamond magnetometers face the challenge of achieving high sensing performance after integration. Here, we demonstrate an integrated fiber-coupled diamond magnetometer based on an MFC with both high sensitivity and a wide dynamic range. We sandwiched a nitrogen-doped diamond film of [111] crystal orientation between the two MFCs. With the polarization direction of the pump laser perpendicular to the NV center axis, the signal-to-noise ratio and its linearity with the magnetic field are enhanced. We demonstrate a sensitivity of 50 \({{\rm{pT}}}/\sqrt{{{\rm{Hz}}}}\)pT/Hz@0.01 Hz and 390(172) \({{\rm{fT}}}/\sqrt{{{\rm{Hz}}}}\)fT/Hz@ > 3 Hz while with a detection range of about 4 times the Earth’s magnetic field. This work demonstrates the feasibility of portable, highly sensitive diamond magnetometers that maintain a large dynamic range in various natural environments.