Volume 144, Number 5, December 2023
|Number of page(s)
|Condensed matter and materials physics
|21 December 2023
Variance properties of the microwave absorption spectrum of an ensemble of nitrogen vacancy centers in diamond
Quantum Nanoelectronics Laboratory, Physics Department and Bar-Ilan Institute of Nanotechnology and Advanced Materials (BINA) - 5290002 Ramat-Gan, Israel
Received: 28 August 2023
Accepted: 30 November 2023
This work presents an original method based on the variance properties of the microwave absorption spectrum of an ensemble of nitrogen vacancy centers in diamond. The spectrum is measured optically. A compact and simple device is designed to optimize the photon collection. We conduct a quantitative comparison of the ensemble's optical signal in both the visible and near infrared range. Using the enhanced signal-to-noise ratio achieved through the device geometry we perform real-time DC magnetometry at moderate light and microwave powers. Under these conditions, the amplitude of a DC magnetic field can be extracted from the variance of the microwave absorption spectrum in a fast and reproducible manner, without the burden of complex fitting techniques.
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