title: Dynamic stabilization of the optical resonances of single nitrogen-vacancy centers in diamond.
abstract: We report electrical tuning by the Stark effect of the excited-state structure of single nitrogen-vacancy (NV) centers located ≲100  nm from the diamond surface. The zero-phonon line (ZPL) emission frequency is controllably varied over a range of 300 GHz. Using high-resolution emission spectroscopy, we observe electrical tuning of the strengths of both cycling and spin-altering transitions. Under resonant excitation, we apply dynamic feedback to stabilize the ZPL frequency. The transition is locked over several minutes and drifts of the peak position on timescales ≳100  ms are reduced to a fraction of the single-scan linewidth, with standard deviation as low as 16 MHz (obtained for an NV in bulk, ultrapure diamond). These techniques should improve the entanglement success probability in quantum communications protocols.
authors.affiliation: Hewlett-Packard Laboratories, 1501 Page Mill Road, Palo Alto, California 94304, USA. victor.acosta@hp.com
authors.forename: V M
authors.initials: VM
authors.lastname: Acosta
authors.forename: C
authors.initials: C
authors.lastname: Santori
authors.forename: A
authors.initials: A
authors.lastname: Faraon
authors.forename: Z
authors.initials: Z
authors.lastname: Huang
authors.forename: K-M C
authors.initials: KM
authors.lastname: Fu
authors.forename: A
authors.initials: A
authors.lastname: Stacey
authors.forename: D A
authors.initials: DA
authors.lastname: Simpson
authors.forename: K
authors.initials: K
authors.lastname: Ganesan
authors.forename: S
authors.initials: S
authors.lastname: Tomljenovic-Hanic
authors.forename: A D
authors.initials: AD
authors.lastname: Greentree
authors.forename: S
authors.initials: S
authors.lastname: Prawer
authors.forename: R G
authors.initials: RG
authors.lastname: Beausoleil