Fast, broad-band magnetic resonance spectroscopy with diamond widefield relaxometry

• URL: http://arxiv.org/abs/2212.06087v2
• Date: Tue, 13 Dec 2022 13:28:39 GMT
• Title: Fast, broad-band magnetic resonance spectroscopy with diamond widefield relaxometry
• Authors: C. Mignon, A. R. Ortiz Moreno, H. Shirzad, S. K. Padamati, V. Damle, Y. Ong, R. Schirhagl, M. Chipaux
• Abstract summary: We present an alternative to conventional Electron Paramagnetic Resonance spectroscopy equipment. We use the photoluminescence of an ensemble of Nitrogen-Vacancy centers at the surface of a diamond. Monitoring their relaxation time (or T1), we detected their cross-relaxation with the compound of interest.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We present an alternative to conventional Electron Paramagnetic Resonance spectroscopy equipment. Avoiding the use of bulky magnets and magnetron equipment, we use the photoluminescence of an ensemble of Nitrogen-Vacancy centers at the surface of a diamond. Monitoring their relaxation time (or T1), we detected their cross-relaxation with the compound of interest. In addition, the EPR spectra is encoded through a localized magnetic field gradient. While 12 minutes was necessary to record each data point of the spectrum with previous individual NV center's technics, we are able to reconstruct a full spectrum at once in 3 seconds, over a range from 3 to 11 gauss. In term of sensitivity, only 0.5 microliter of a hexaaquacopper (II) ion solution with 1 micromole per liter concentration was necessary.

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