Near-infrared-assisted charge control and spin readout of the nitrogen-vacancy center in diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2016-12-09 |
| Journal | Physical review. B./Physical review. B |
| Authors | David A. Hopper, Richard R. Grote, Annemarie L. Exarhos, Lee C. Bassett |
| Institutions | University of Pennsylvania |
| Citations | 71 |
Abstract
Section titled āAbstractāWe utilize nonlinear absorption to design all-optical protocols that improve\nboth charge state initialization and spin readout for the nitrogen-vacancy (NV)\ncenter in diamond. Non-monotonic variations in the equilibrium charge state as\na function of visible and near-infrared (NIR) optical power are attributed to\ncompeting multiphoton absorption processes. In certain regimes, multicolor\nillumination enhances the steady-state population of the NVās negative charge\nstate above 90%. At higher NIR intensities, selective ionization of the singlet\nmanifold facilitates a protocol for spin-to-charge conversion that dramatically\nenhances the spin readout fidelity. We demonstrate a 6-fold increase in the\nsignal-to-noise ratio for single-shot spin measurements and predict an\norders-of-magnitude experimental speedup over traditional methods for emerging\napplications in magnetometry and quantum information science using NV spins.\n