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

• 来源期刊: 光：科学与应用（英文版）
• 关键词: diamond nanophotonics fiber optics nitrogen vacancy center quantum optics single photon source
• 年，卷（期）: 2016,（1）
• 页码范围: 129-134
• 页数: 6页
• 语种: 中文
• DOI: 10.1038/lsa.2016.32

摘要

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.