Abstract
The neutral charge state plays an important role in quantum information and sensing applications based on nitrogen-vacancy centers. However, the orbital and spin dynamics remain unexplored. Here, we use resonant excitation of single centers to directly reveal the fine structure, enabling selective addressing of spin-orbit states. Through pump-probe experiments, we find the orbital relaxation time (430ns at 4.7K) and measure its temperature dependence up to 11.8K. Finally, we reveal the spin relaxation time (1.5s) and realize projective high-fidelity single-shot readout of the spin state (≥98%).
Highlights
The neutral charge state plays an important role in quantum information and sensing applications based on nitrogen-vacancy centers
We find that P↓ decreases on a timescale faster than can be explained by spin relaxation alone, showing that the optical excitation induces spin pumping
We find a significant increase of PNV− due to optically induced charge conversion [19,42]
Summary
The neutral charge state plays an important role in quantum information and sensing applications based on nitrogen-vacancy centers. Orbital and Spin Dynamics of Single Neutrally-Charged Nitrogen-Vacancy Centers in Diamond We use resonant excitation of single centers to directly reveal the fine structure, enabling selective addressing of spin-orbit states.
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