NV- - N+ pair centre in 1b diamond

Abstract

The study establishes that the degree of optically induced spin polarization that can be achieved for NV${}^{-}$in 1b diamond is limited by the concentration of single substitutional nitrogen, N${}^0$ . The polarization of the individual NV centres in the diamond is dependent on the separation of the NV${}^{-}$ and the nitrogen donor. When the NV${}^{-}$ - N${}^{+}$ pair separation is large the properties of the pair will be as for single sites and a high degree of spin polarization attainable. When the separation decreases the emission is reduced, the lifetime shortened and the spin polarization downgraded. The deterioration occurs as a consequence of electron tunneling in the excited state from NV${}^{-}$ to N${}^{+}$ and results in an optical cycle that includes NV${}^0$. The tunneling process is linear in optical excitation and more prevalent the closer the N${}^{+}$ is to the NV${}^{-}$ centre. However, the separation between the NV${}^{-}$ and its donor N${}^{+}$ can be effected by light through the excitation of NV${}^{-}$ and/or ionization of N${}^0$. The optical excitation that creates the spin polarization can also modify the sample properties and during excitation creates charge dynamics. The consequence is that the magnitude of spin polarization, the spin relaxation and coherence times T${}_1$ and T${}_2$ have a dependence on the nitrogen concentration and on the excitation wavelength. The adjacent N${}^{+}$ gives an electric field that Stark shifts the NV${}^{-}$ transitions and for an ensemble results in line broadening. It is observation of changes of these Stark induced effects that allow the variation in NV${}^{-}$ - N${}^{+}$ separation to be monitored. Spectroscopic measurements including that of the varying line widths are central to the study. They are made at low temperatures and include extensive measurements of the NV${}^{-}$ optical transition at 637 nm, the infrared transition at 1042 nm and ODMR at 2.87 GHz.

33 Pages, 33 figures

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Cited by in corpus (33)

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• Optically Enhanced Electric Field Sensing Using Nitrogen-Vacancy Ensembles
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• Selective measurement of charge dynamics in an ensemble of nitrogen-vacancy centers in nano- and bulk diamonds
• Spectral Broadening and Ultrafast Dynamics of a Nitrogen-Vacancy Center Ensemble in Diamond
• Impact of Charge Conversion on NV-Center Relaxometry
• High performance superconducting nanowire single photon detectors operating at temperature from 4 to 7 K
• Quasi-Floquet prethermalization in a disordered dipolar spin ensemble in diamond
• Microwave-assisted spectroscopy technique for studying charge state in nitrogen-vacancy ensembles in diamond
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• Comparison of different methods of nitrogen-vacancy layer formation in diamond for widefield quantum microscopy
• Proximal nitrogen reduces the fluorescence quantum yield of nitrogen-vacancy centres in diamond
• Divergent effects of laser irradiation on ensembles of nitrogen-vacancy centers in bulk and nano-diamonds: implications for biosensing
• Magnetic-Torque Enhanced by Tunable Dipolar interactions
• Optimisation of electron irradiation for creating spin ensembles in hexagonal boron nitride
• The $N_{2}V$ color center: a ubiquitous visible and near-infrared-II quantum emitter in nitrogen-doped diamond
• Wavelength dependence of nitrogen-vacancy center charge cycling
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• High-resolution spectroscopy of a single nitrogen-vacancy defect at zero magnetic field
• Widefield quantum microscopy with nitrogen-vacancy centers in diamond: strengths, limitations, and prospects
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• Optically Coherent Nitrogen-Vacancy Centers in HPHT Treated Diamonds
• Optical Switching of ${\chi }^{(2)}$ in Diamond Photonics
• Photoconversion of shallow nitrogen-vacancy centers in flat and nanostructured diamond under high-power laser irradiation
• Optimising optical tweezers experiments for magnetic resonance sensing with nanodiamonds