Related papers: Quantum Diamond Microscope for Narrowband Magnetic Imaging with High Spatial and Spectral Resolution

Quantum Diamond Microscope for Narrowband Magnetic Imaging with High Spatial and Spectral Resolution

URL: http://arxiv.org/abs/2406.15450v1
Date: Thu, 6 Jun 2024 15:57:53 GMT
Title: Quantum Diamond Microscope for Narrowband Magnetic Imaging with High Spatial and Spectral Resolution
Authors: Zechuan Yin, Jiashen Tang, Connor A. Hart, John W. Blanchard, Xinyan Xiang, Saipriya Satyajit, Smriti Bhalerao, Tao Tao, Stephen J. DeVience, Ronald L. Walsworth,
Abstract summary: The quantum diamond microscope (QDM) is a recently developed technology for near-field imaging of magnetic fields with micron-scale spatial resolution. The present instrument has spatial resolution $approx2,mathrmmu m$, field-of-view $approx300times300,mathrmmu m2$, and per-pixel sensitivity to narrowband fields $sim1,$nT$cdot$Hz$-1/2$.
Score: 1.7728122624261802
License: http://creativecommons.org/licenses/by/4.0/
Abstract: The quantum diamond microscope (QDM) is a recently developed technology for near-field imaging of magnetic fields with micron-scale spatial resolution. In the present work, we integrate a QDM with a narrowband measurement protocol and a lock-in camera; and demonstrate imaging of radiofrequency (RF) magnetic field patterns produced by microcoils, with spectral resolution $\approx1$\,Hz. This RF-QDM provides multi-frequency imaging with a central detection frequency that is easily tunable over the MHz-scale, allowing spatial discrimination of both crowded spectral peaks and spectrally well-separated signals. The present instrument has spatial resolution $\approx2\,\mathrm{\mu m}$, field-of-view $\approx300\times300\,\mathrm{\mu m^2}$, and per-pixel sensitivity to narrowband fields $\sim{1}\,$nT$\cdot$Hz$^{-1/2}$. Spatial noise can be reduced to the picotesla scale by signal averaging and/or spatial binning. The RF-QDM enables simultaneous imaging of the amplitude, frequency, and phase of narrowband magnetic field patterns at the micron-scale, with potential applications in real-space NMR imaging, AC susceptibility mapping, impedance tomography, analysis of electronic circuits, and spatial eddy-current-based inspection.

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