Superconducting single-photon detectors integrated with diamond nanophotonic circuits
Superconducting single-photon detectors integrated with diamond nanophotonic circuits
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DOI：
10.1038/lsa.2015.111
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发表时间：
2015-05
期刊：
影响因子：
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通讯作者：
P. Rath;O. Kahl;S. Ferrari;F. Sproll;G. Lewes‐Malandrakis;D. Brink;K. Ilin;M. Siegel;C. Neb
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文献类型：
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作者：
P. Rath;O. Kahl;S. Ferrari;F. Sproll;G. Lewes‐Malandrakis;D. Brink;K. Ilin;M. Siegel;C. Neb
光子量子技术有望在非经典应用中重复集成纳米光子电路的成功。使用线性光学元件，量子光学计算可以用集成光学电路来执行，因此可以克服现有的可扩展性方面的限制。除了用于实现光子量子门的无源光学器件外，有源元件，如单光子源和单光子探测器，是未来光量子电路的重要组成部分。允许所有组件单片集成的材料系统特别有吸引力，包括III-V族半导体、硅和金刚石。在这里，我们展示了由高质量的多晶金刚石薄膜与片上单光子探测器相结合制成的纳米光子集成电路。通过使用超导纳米线的倏逝耦合行波，我们实现了高达66%的高检测效率，以及低暗计数率和190 ps的定时分辨率。我们的设备是完全可扩展的，并有望成为功能性金刚石光子量子设备。
Photonic quantum technologies hold promise to repeat the success of integrated nanophotonic circuits in non-classical applications. Using linear optical elements, quantum optical computations can be performed with integrated optical circuits and can therefore overcome the existing limitations in terms of scalability. In 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 circuits. Material systems that allow for the monolithic integration of all components are particularly attractive, including III-V semiconductors, silicon and diamond. Here, we demonstrate nanophotonic integrated circuits made from high-quality polycrystalline diamond thin films in combination with on-chip single-photon detectors. By 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 ps. Our devices are fully scalable and hold promise for functional diamond photonic quantum devices.