Charge state dynamics of the nitrogen vacancy center in diamond under 1064 nm laser excitation

Abstract

The photophysics and charge state dynamics of the nitrogen vacancy (NV) center in diamond has been extensively investigated but is still not fully understood. In contrast to previous work, we find that NV${}^0$ converts to NV${}^{-}$ under excitation with low power near-infrared (1064 nm) light, resulting in $increased$ photoluminescence from the NV${}^{-}$ state. We used a combination of spectral and time-resolved photoluminescence experiments and rate-equation modeling to conclude that NV${}^0$ converts to NV${}^{-}$ via absorption of 1064 nm photons from the valence band of diamond. We report fast quenching and recovery of the photoluminescence from $both$ charge states of the NV center under low power 1064 nm laser excitation, which has not been previously observed. We also find, using optically detected magnetic resonance experiments, that the charge transfer process mediated by the 1064 nm laser is spin-dependent.

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• Negative charge enhancement of near-surface nitrogen vacancy centers by multicolor excitation
• Selective measurement of charge dynamics in an ensemble of nitrogen-vacancy centers in nano- and bulk diamonds
• Monitoring spin coherence of single nitrogen-vacancy centers in nanodiamonds during pH changes in aqueous buffer solutions
• Near-infrared-enhanced charge state conversion for low power optical nanoscopy with nitrogen vacancy center in diamond
• Multiple-photon excitation of nitrogen vacancy center in diamond
• Probing NV and SiV charge state dynamics using high-voltage nanosecond pulse and photoluminescence spectral analysis
• The role of exchange interaction in nitrogen vacancy centre-based magnetometry
• Observation of the Magneto-Optic Voigt Effect in a Paramagnetic Diamond Membrane
• Spin-based magnetic detection of optically trapped single cell in microfluidic channel
• Optimising optical tweezers experiments for magnetic resonance sensing with nanodiamonds
• Sensing with near-infrared laser trapped fluorescent nanodiamonds
• Thermometry of an optically levitated nanodiamond