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Superconducting single-photon detectors integrated with diamond nanophotonic circuits

Light(Science & Applications) 2015年第1期4卷 171-178页

作者： Patrik Rath Oliver Kahl Simone Ferrari Fabian Sproll Georgia Lewes-Malandrakis Dietmar Brink Konstantin Ilin Michael Siegel Christoph Nebel Wolfram Pernice Institute of Nanotechnology Karlsruhe Institute of Technology76021 KarlsruheGermany Institute of Micro-and Nanoelectronic Systems Karlsruhe Institute of Technology76187 KarlsruheGermany Fraunhofer Institute for Applied Solid State Physics Tullastr.7279108 FreiburgGermany

Photonic quantum technologies hold promise to repeat the success of integrated nanophotonic circuits in non-classical *** linear optical elements,quantum optical computations can be performed with integrated optical circuits and can therefore overcome the existing limitations in terms of *** addition to passive optical devices for realizing photonic quantum gates,active elements,such as single-photon sources and single-photon detectors,are essential ingredients for future optical quantum *** systems that allow for the monolithic integration of all components are particularly attractive,including III-V semiconductors,silicon and ***,we demonstrate nanophotonic integrated circuits made from high-quality polycrystalline diamond thin films in combination with on-chip single-photon *** using superconducting nanowires that are coupled evanescently to traveling waves,we achieve high detection efficiencies of up to 66%as well as low dark count rates and a timing resolution of 190 *** devices are fully scalable and hold promise for functional diamond photonic quantum devices.

关键词： diamond nanophotonics integrated optics superconducting single-photon detectors

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

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Light(Science & Applications) 2016年第1期5卷 671-676页

作者： Rishi N Patel Tim Schröder Noel Wan Luozhou Li Sara L Mouradian Edward H Chen Dirk R Englund Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology77 Massachusetts AveCambridgeMA 02139USA Department of Applied Physics Stanford University348 Via Pueblo MallStanfordCA 94305USA

A central goal in quantum information science is to efficiently interface photons with single optical modes for quantum networking and distributed quantum ***,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 *** this approach,single-mode tapered diamond waveguides containing exactly one high quality NV memory are selected and integrated on tapered silica *** optimization of an adiabatic coupler indicates that near-unity-efficiency photon transfer is possible between the two ***,we find an overall collection efficiency between 16%and 37%and estimate a single photon count rate at saturation above 700 *** integrated system enables robust,alignment-free,and efficient interfacing of single-mode optical fibers with single photon emitters and quantum memories in solids.

关键词： diamond nanophotonics fiber optics nitrogen vacancy center quantum optics single photon source

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