Optical detection of paramagnetic defects in diamond using off-resonance excitation of NV centers

Abstract

In this work we use fluorescence from nitrogen-vacancy defects in diamond to detect and explore other paramagnetic defects in the diamond, such as P1 defects, which are commonly undetectable through optical detection of magnetic resonance in standard conditions. Our method does not require overlap between the defects' resonances and therefore is applicable in a wide region of magnetic fields and frequencies, as verified by excellent fit to theoretical predictions. We propose a depolarization scheme of P1 defects to account for the observed data. To verify our results, we perform cavity-based detection of magnetic resonance and find a good agreement between the measured optically induced polarization and the value obtained theoretically from rate equations. The findings in this work may open the way to detection of paramagnetic defects outside of the diamond through the photoluminesence of nitrogen-vacancy defects, which might be useful for imaging in biology.

References in corpus (10)

• Dynamic strain-mediated coupling of a single diamond spin to a mechanical resonator
• Spin dynamics in the optical cycle of single nitrogen-vacancy centres in diamond
• Quenching Spin Decoherence in Diamond through Spin Bath Polarization
• Polarization and readout of coupled single spins in diamond
• Coherence of single spins coupled to a nuclear spin bath of varying density
• Spin dynamics of diamond nitrogen-vacancy centres at the ground state level anti-crossing and all-optical low frequency magnetic field sensing
• Optically detected nuclear quadrupolar interaction of 14N in nitrogen-vacancy centers in diamond
• Intermodulation Gain in Nonlinear NbN Superconducting Microwave Resonators
• Optical hyperpolarization of nitrogen donor spins in bulk diamond
• Magnon Condensation in a Dense Nitrogen-Vacancy Spin Ensemble