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The AFM Probe
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All-Optical Magnetic Imaging Protocol to Achieve Angstrom-Scale Resolution with Spin Defects in van der Waals

Ning Wang1, Jianming Cai1,2, Chao Lei3

  • 1Huazhong University of Science and Technology, School of Physics, Hubei Key Laboratory of Gravitation and Quantum Physics, Institute for Quantum Science and Engineering, International Joint Laboratory on Quantum Sensing and Quantum Metrology, Center for Intelligence and Quantum Science (CIQS), Wuhan 430074, China.

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|August 12, 2025
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Summary

Researchers developed a new angstrom-scale magnetic imaging technique using spin defects and terahertz microscopy. This all-optical method offers unprecedented resolution for studying quantum material magnetic textures.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Materials Science
  • Nanotechnology

Background:

  • Exploring magnetic textures in quantum materials requires ultrahigh spatial resolution.
  • Current imaging techniques face limitations in achieving atomic-scale resolution.

Purpose of the Study:

  • To propose a novel magnetic imaging protocol with angstrom-scale resolution.
  • To enable detailed investigation of magnetic textures in emerging quantum materials.

Main Methods:

  • Combining spin defects in van der Waals materials with terahertz (THz) scattering scanning near-field optical microscopy.
  • Utilizing exchange interactions between probe and sample spins at angstrom distances.
  • Employing THz optics and spin-dependent fluorescence for optical resolution of energy splitting.

Main Results:

  • Achieved angstrom-scale resolution in magnetic imaging.
  • Demonstrated a novel all-optical protocol for magnetic texture analysis.
  • Established a method leveraging spin defects for enhanced probe-sample interaction.

Conclusions:

  • The proposed protocol offers a significant advancement in magnetic imaging resolution.
  • This technique is highly promising for investigating complex magnetic textures in condensed matter physics.
  • The all-optical nature ensures excellent compatibility and high spatial resolution for future studies.