Quantum diamond microscopy with optimized magnetic field sensitivity and sub-ms temporal resolution
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-05-23 |
| Journal | Journal of Applied Physics |
| Authors | Sangwon Oh, Seong-Joo Lee, Jeong Hyun Shim, Nam Woong Song, TrĘ°Ę”ng Thį» HiĆŖn |
| Institutions | Korea Research Institute of Standards and Science, Korea University of Science and Technology |
| Citations | 1 |
Abstract
Section titled āAbstractāQuantum diamond magnetometers using lock-in detection have successfully detected weak bio-magnetic fields from neurons, a live mammalian muscle, and a live mouse heart. This opens up the possibility of quantum diamond magnetometers visualizing microscopic distributions of the bio-magnetic fields. Here, we demonstrate a lock-in-based widefield quantum diamond microscopy, achieving a mean volume-normalized per-pixel sensitivity of 43.9 nTĪ¼m1.5/Hz0.5. We optimize the sensitivity by implementing a double resonance with hyperfine driving and magnetic field alignment along the āØ001ā© orientation of the diamond. Additionally, we show that sub-ms temporal resolution (ā¼0.4 ms) can be achieved while keeping the per-pixel sensitivity at a few tens of nanotesla per second using quantum diamond microscopy. This lock-in-based diamond quantum microscopy could be a step forward in mapping functional activity in neuronal networks in micrometer spatial resolution.