Near-infrared-assisted charge control and spin readout of the nitrogen-vacancy center in diamond

Article

关键词: QUANTUM LOGIC;    STATE;    FLUORESCENCE;    MODULATION;   

DOI  :  10.1103/PhysRevB.94.241201

来源: SCIE

【 摘 要 】

We utilize nonlinear absorption to design all-optical protocols that improve both charge-state initialization and spin readout for the nitrogen-vacancy (NV) center in diamond. Nonmonotonic variations in the equilibrium charge state as a function of visible and near-infrared optical power are attributed to competing multiphoton absorption processes. In certain regimes, multicolor illumination enhances the steady-state population of the NV's negative charge state above 90%. At higher NIR intensities, selective ionization of the singlet manifold facilitates a protocol for spin-to-charge conversion that dramatically enhances the spin readout fidelity. We demonstrate a sixfold increase in the signal-to-noise ratio for single-shot spin measurements and demonstrate a pathway towards single-shot electron spin readout at room temperature.

【 授权许可】

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