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

David A. Hopper, Richard R. Grote, Annemarie L. Exarhos, and Lee C. Bassett
Phys. Rev. B 94, 241201(R) – Published 9 December 2016
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Abstract

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.

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  • Received 15 June 2016
  • Revised 1 August 2016

DOI:https://doi.org/10.1103/PhysRevB.94.241201

©2016 American Physical Society

Physics Subject Headings (PhySH)

General PhysicsCondensed Matter, Materials & Applied PhysicsQuantum Information, Science & Technology

Authors & Affiliations

David A. Hopper1,2, Richard R. Grote1, Annemarie L. Exarhos1, and Lee C. Bassett1,*

  • 1Quantum Engineering Laboratory, Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
  • 2Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA

  • *lbassett@seas.upenn.edu

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Issue

Vol. 94, Iss. 24 — 15 December 2016

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