Charge dynamics in near-surface, variable-density ensembles of nitrogen-vacancy centers in diamond

Abstract

Although the spin properties of superficial shallow nitrogen-vacancy (NV) centers have been the subject of extensive scrutiny, considerably less attention has been devoted to studying the dynamics of NV charge conversion near the diamond surface. Using multi-color confocal microscopy, here we show that near-surface point defects arising from high-density ion implantation dramatically increase the ionization and recombination rates of shallow NVs compared to those in bulk diamond. Further, we find that these rates grow linearly not quadratically with laser intensity, indicative of single-photon processes enabled by NV state mixing with other defect states. Accompanying these findings we observe NV ionization and recombination in the dark, likely the result of charge transfer to neighboring traps. In spite of the altered charge dynamics, we show one can imprint rewritable, long-lasting patterns of charged-initialized, near-surface NVs over large areas, an ability that could be exploited for electrochemical biosensing or to optically store digital data sets with sub-diffraction resolution.

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• Diamond surface engineering for molecular sensing with nitrogen-vacancy centers
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• Charge State Dynamics and Optically Detected Electron Spin Resonance Contrast of Shallow Nitrogen-Vacancy Centers in Diamond
• Fast wide-field quantum sensor based on solid-state spins integrated with a SPAD array
• Selective measurement of charge dynamics in an ensemble of nitrogen-vacancy centers in nano- and bulk diamonds
• Imaging graphene field-effect transistors on diamond using nitrogen-vacancy microscopy
• Prospects for nuclear spin hyperpolarisation of molecular samples using nitrogen-vacancy centres in diamond
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• Giant nonlinear optical effects induced by nitrogen-vacancy centers in diamond crystals
• Spin dynamics of a solid-state qubit in proximity to a superconductor
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• Probing metastable space-charge potentials in a wide bandgap semiconductor
• Super-resolution diamond magnetic microscopy of superparamagnetic nanoparticles
• Neutral Silicon Vacancy Centers in Diamond via Photoactivated Itinerant Carriers
• Divergent effects of laser irradiation on ensembles of nitrogen-vacancy centers in bulk and nano-diamonds: implications for biosensing
• Long-term spin state storage using ancilla charge memories
• Magnetic-Torque Enhanced by Tunable Dipolar interactions
• Photo-induced charge state dynamics of the neutral and negatively charged silicon vacancy centers in room-temperature diamond
• Photoinduced charge injection from shallow point defects in diamond into water
• Robust quantification of the diamond nitrogen-vacancy center charge state via photoluminescence spectroscopy
• Quantum spin probe of single charge dynamics
• Charge and Spin Dynamics and Destabilization of Shallow Nitrogen-Vacancy Centers under UV and Blue Excitation
• Ion sensors with crown ether-functionalized nanodiamonds