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Phys Rev Lett. 2011 Dec 23;107(26):266403. Epub 2011 Dec 22.

Electrical tuning of single nitrogen-vacancy center optical transitions enhanced by photoinduced fields.

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Center for Spintronics and Quantum Computation, University of California, Santa Barbara, California 93106, USA.


We demonstrate precise control over the zero-phonon optical transition energies of individual nitrogen-vacancy (NV) centers in diamond by applying multiaxis electric fields, via the dc Stark effect. The Stark shifts display surprising asymmetries that we attribute to an enhancement and rectification of the local electric field by photoionized charge traps in the diamond. Using this effect, we tune the excited-state orbitals of strained NV centers to degeneracy and vary the resulting degenerate optical transition frequency by >10 GHz, a scale comparable to the inhomogeneous frequency distribution. This technique will facilitate the integration of NV-center spins within photonic networks.

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