Efficient photon coupling from a diamond nitrogen vacancy center by integration with silica fiber

Light, Science & Applications
Rishi N PatelDirk Englund

Abstract

A central goal in quantum information science is to efficiently interface photons with single optical modes for quantum networking and distributed quantum computing. Here, we introduce and experimentally demonstrate a compact and efficient method for the low-loss coupling of a solid-state qubit, the nitrogen vacancy (NV) center in diamond, with a single-mode optical fiber. In this approach, single-mode tapered diamond waveguides containing exactly one high quality NV memory are selected and integrated on tapered silica fibers. Numerical optimization of an adiabatic coupler indicates that near-unity-efficiency photon transfer is possible between the two modes. Experimentally, we find an overall collection efficiency between 16% and 37% and estimate a single photon count rate at saturation above 700 kHz. This integrated system enables robust, alignment-free, and efficient interfacing of single-mode optical fibers with single photon emitters and quantum memories in solids.

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Citations

Jun 15, 2018·Nature·Peter C HumphreysRonald Hanson
Oct 25, 2016·Scientific Reports·Panagiotis VergyrisSébastien Tanzilli
Sep 25, 2018·Light, Science & Applications·Hamidreza SiampourSergey I Bozhevolnyi
Jun 14, 2019·Proceedings of the National Academy of Sciences of the United States of America·Su-Peng YuH J Kimble
Nov 15, 2018·Micromachines·Lykourgos BougasDmitry Budker

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