Nitrogen-Vacancy Center Coupled to an Ultrasmall-Mode-Volume Cavity: A High-Efficiency Source of Indistinguishable Photons at 200 K

Joe A. Smith, Chloe Clear, Krishna C. Balram, Dara P.S. McCutcheon, John G. Rarity

Research output: Contribution to journalArticle (Academic Journal)peer-review

11 Citations (Scopus)

Abstract

Solid-state atomlike systems have great promise for linear optic quantum computing and quantum communication but are burdened by phonon sidebands and broadening due to surface charges. Nevertheless, coupling to a small-mode-volume cavity would allow high rates of extraction from even highly dephased emitters. We consider the nitrogen-vacancy center in diamond, a system understood to have a poor quantum optics interface with highly distinguishable photons, and design a silicon nitride cavity that allows 99% efficient extraction of photons at 200 K with an indistinguishability of > 50%, improvable by external filtering. We analyze our design using Lumerical fdtd simulations and treat optical emission using a cavity-QED master equation valid at and beyond strong coupling and that includes both zero-phonon line broadening and sideband emission. The simulated design is compact ( <10 𝜇⁢m) and, owing to its planar geometry, can be fabricated using standard silicon processes. Our work therefore points toward scalable fabrication of noncryogenic atomlike efficient sources of indistinguishable photons.

Original languageEnglish
Article number034029
JournalPhysical Review Applied
Volume15
Issue number3
DOIs
Publication statusPublished - 10 Mar 2021

Bibliographical note

Funding Information:
J.S. thanks Felipe Ortiz Huerta and Jorge Monroy Ruz for useful discussions. This work was supported by the Engineering and Physical Sciences Research Council (EPSRC) (Grants No. EP/L015544/1, No. EP/S023607/1, and No. EP/M024458/1), the European Research Council (ERC) (SBS 3-5, 758843), and the British Council (Grant No. IL 6 352345416).

Publisher Copyright:
© 2021 American Physical Society.

Research Groups and Themes

  • Bristol Quantum Information Institute
  • QETLabs
  • Photonics and Quantum

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