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