RQC Seminar

190th RQC Seminar

• Speaker

  Dr. Sorawis Sangtawesin
  ( School of Physics, Institute of Science, Suranaree University of Technology )

• Date

  13:30-14:30 (1:30 p.m. - 2:30 p.m.), April 17, 2025 (Thursday)

• Venue

  Hybrid(ZOOM・ Room S507 at Wako Chem. & Mat.Phys. Bldg. / 物質科学研究棟 S507 (S51))）

• Title

  Vector Magnetometry with Nitrogen-Vacancy Centers in Diamond

• Inquiries

  yasunobu.nakamura[at]riken.jp

Abstract
Magnetometry plays a crucial role in precision sensing, with nitrogen-vacancy (NV) centers in diamond revolutionizing the field by enabling highly sensitive, nanoscale magnetic field detection for applications in quantum technology, materials science, and biomedical imaging. We present vector magnetic field imaging techniques using optically detected magnetic resonance (ODMR) spectroscopy of the NV center electronic transitions. The different orientations of NV axes within the ensemble result in distinct, non-linear Zeeman splitting of the spin transitions that arise from the interaction of an external magnetic field and the NV center crystal field. We demonstrate vector magnetic field calculations and utilize the NV center to visualize the magnetic field emanating from a permanent magnet. In the future, we will apply the methods to perform micron-scale magnetic field imaging. Additionally, we will discuss the impact of surface electronic and magnetic noise on such measurements and present examples of pristine diamond surface preparations for micro- and nanoscale quantum sensing.