Coupled charge and spin dynamics in high-density ensembles of nitrogen-vacancy centers in diamond

@article{Giri2018CoupledCA,
  title={Coupled charge and spin dynamics in high-density ensembles of nitrogen-vacancy centers in diamond},
  author={Rakshyakar Giri and Federico Alberto Gorrini and Carla Dorigoni and Claudia Esther Avalos and Massimo Cazzanelli and Stefano Tambalo and Angelo Bifone},
  journal={Physical Review B},
  year={2018}
}
We studied the spin depolarization of ensembles of nitrogen-vacancy (NV) centers in nitrogen-rich single crystal diamonds. We found a strong dependence of the evolution of the polarized state in the dark on the concentration of NV centers. At low excitation power, we observed a simple exponential decay profile in the low-density regime and a paradoxical inverted exponential profile in the high-density regime. At higher excitation power, we observed complex behavior, with an initial sharp rise… Expand

Figures from this paper

Relaxation of a dense ensemble of spins in diamond under a continuous microwave driving field
TLDR
This combined investigation provides new insight into fundamental spin relaxation processes under continuous driving electromagnetic fields and paves ways to better understanding of this underexplored phenomena using single NV− centers, which have shown promising applications in quantum computing and quantum metrology. Expand
Photoconversion of shallow nitrogen-vacancy centers in flat and nanostructured diamond under high-power laser irradiation
Shallow, negatively-charged Nitrogen-Vacancy centers (NV-) in diamond have been proposed for high-sensitivity magnetometry and spin-polarization transfer applications. However, surface effects tendExpand
Selective measurement of charge dynamics in an ensemble of nitrogen-vacancy centers in nanodiamond and bulk diamond
Nitrogen-vacancy (NV) centers in diamond have attracted considerable interest in sensing of weak magnetic fields, such as those created by biological systems. Detecting such feeble signals requiresExpand
Divergent effects of laser irradiation on ensembles of nitrogen-vacancy centers in bulk and nano-diamonds: implications for biosensing
Ensembles of negatively charged nitrogen vacancy centers (NV-) in diamond have been proposed for sensing of magnetic fields and paramagnetic agents, and as a source of spin-order for theExpand
Long-Lived Ensembles of Shallow NV– Centers in Flat and Nanostructured Diamonds by Photoconversion
TLDR
It is demonstrated that high laser power strongly promotes photoconversion of NV0 to NV– centers and the excess NV– population is stable over a timescale of 100 ms after switching off the laser, resulting in long-lived enrichment of shallow NV–. Expand
Magnon condensation in a dense nitrogen-vacancy spin ensemble
The feasibility of creating a Bose-Einstein condensate of magnons using a dense ensemble of nitrogen-vacancy spin defects in diamond is investigated. Through assessing a density-dependent spinExpand
High NV density in a pink CVD diamond grown with N2O addition
Abstract Growing high-purity diamond containing dense negatively charged nitrogen-vacancy (NV−) centre ensembles is desirable for the development of sensitive quantum sensors that explore theExpand
Identifying and Mitigating Charge Instabilities in Shallow Diamond Nitrogen-Vacancy Centers.
TLDR
This work measures, analyzes, and controls charge-state behavior in individual near-surface nitrogen-vacancy centers in diamond, where NV^{-} hosts the metrologically relevant electron spin, and identifies tunneling to a single local electron trap as the mechanism for ionization in the dark. Expand
Microwave-Assisted Spectroscopy Technique for Studying Charge State in Nitrogen-Vacancy Ensembles in Diamond
We introduce a microwave-assisted spectroscopy technique to determine the relative concentrations of nitrogen vacancy (NV) centers in diamond that are negatively-charged (NV${}^-$) andExpand
Quantum Many-Body Dynamics of a Disordered Electronic Spin Ensemble in Diamond
A strongly interacting driven spin system can display a variety of interesting manybody quantum phenomena due to the interplay of interaction, disorder and coherent driving. Using a dense electronicExpand
...
1
2
3
...

References

SHOWING 1-10 OF 49 REFERENCES
Spin dynamics in the optical cycle of single nitrogen-vacancy centres in diamond
We investigate spin-dependent decay and intersystem crossing (ISC) in the optical cycle of single negatively charged nitrogen-vacancy (NV) centres in diamond. We use spin control and pulsed opticalExpand
Temperature- and magnetic-field-dependent longitudinal spin relaxation in nitrogen-vacancy ensembles in diamond.
TLDR
An experimental study of the longitudinal electron-spin relaxation time (T1) of negatively charged nitrogen-vacancy ensembles in diamond as a function of temperature and magnetic field reveals three processes responsible for T1 relaxation. Expand
Photo-induced ionization dynamics of the nitrogen vacancy defect in diamond investigated by single-shot charge state detection
The nitrogen–vacancy centre (NV) has drawn much attention for over a decade, yet detailed knowledge of the photophysics needs to be established. Under typical conditions, the NV can have two stableExpand
Optical polarization of nuclear ensembles in diamond
We report polarization of a dense nuclear-spin ensemble in diamond and its dependence on magnetic field and temperature. The polarization method is based on the transfer of electron spin polarizationExpand
Longitudinal spin relaxation in nitrogen-vacancy ensembles in diamond
We present an experimental study of the longitudinal electron-spin relaxation of ensembles of negatively charged nitrogen-vacancy (NV−) centers in diamond. The measurements were performed withExpand
Negative charge enhancement of near-surface nitrogen vacancy centers by multicolor excitation
Nitrogen-Vacancy (NV) centers in diamond have been identified over the past few years as promising systems for a variety of applications, ranging from quantum information science to magnetic sensing.Expand
Optical patterning of trapped charge in nitrogen-doped diamond
TLDR
This work uses two-colour optical microscopy to investigate the dynamics of NV photo-ionization, charge diffusion and trapping in type-1b diamond, and combines fixed-point laser excitation and scanning fluorescence imaging to locally alter the concentration of negatively charged NVs and probe the corresponding redistribution of charge. Expand
Dynamic nuclear spin polarization of liquids and gases in contact with nanostructured diamond.
TLDR
It is found that adsorbed nuclear spins relax to positive or negative polarization depending on the average paramagnetic center depth and nanoscale surface topology, which could be exploited to polarize flowing liquids or gases. Expand
Universal enhancement of the optical readout fidelity of single electron spins at nitrogen-vacancy c
Precise readout of spin states is crucial for any approach toward physical realization of a spin-based quantum computer and for magnetometry with single spins. Here, we report a method to stronglyExpand
Optical manipulation of the charge state of nitrogen-vacancy center in diamond
The conversion between two nitrogen vacancy (NV) center charge states (NV0 and NV−) was experimentally studied with laser in the range from 378 to 492 nm. The wavelength and power dependent chargeExpand
...
1
2
3
4
5
...