Presentation Information
[8a-C310-4]Detection of Dark Electron Spins via Scanning Diamond NV Probe Microscopy
and Its Prospects for Nano-MRI
〇(PC)Dwi Prananto1, Toshu An1 (1.JAIST)
Keywords:
Scanning diamond NV probe microscopy,Double electron-electron spin resonance,Quantum sensing
Spin detection by magnetic resonance has played a significant role in elucidating physical, chemical, and biological processes through noninvasive imaging of the internal structure of materials. Recent advances in scanning diamond nitrogen-vacancy (NV) probe microscopy (SNVM) have enabled nanoscale magnetic imaging with a practical resolution of about 10 nm [1]. SNVM has been demonstrated to perform single-electron spin magnetic field imaging of an optically addressable single electron spin [2]. Another area of interest is the detection and coherent control of optically dark electron spins on or near the surfaces of the samples. For this purpose, the double electron-electron spin resonance (DEER) protocol was implemented for an SNVM tip. First, with the tip retracted from the sample, DEER signals from dark spins on the tip surface were observed as an electron paramagnetic resonance spectrum, with a Landé g-factor of about 2. Next, with the tip-approached condition, an increase in the DEER signal was observed, highlighting the prospect of imaging dark spins on a material’s surface by subtracting these two signals. We will present a preliminary result on magnetic resonance imaging of a sample with dark electron spins on its surface.
References:
[1] Z. Xu et al., ACS Nano 19, 8255 (2025).
[2] M. S. Grinolds et al., Nat. Phys. 9, 215 (2013).
References:
[1] Z. Xu et al., ACS Nano 19, 8255 (2025).
[2] M. S. Grinolds et al., Nat. Phys. 9, 215 (2013).