Institute of Physics, Humboldt-Universität zu Berlin, Newtonstraße 15, D-12489 Berlin, Germany.
Nano Lett. 2011 Jan 12;11(1):198-202. doi: 10.1021/nl103434r. Epub 2010 Dec 7.
An alignment free, micrometer-scale single photon source consisting of a single quantum emitter on an optical fiber operating at room temperature is demonstrated. It easily integrates into fiber optic networks for quantum cryptography or quantum metrology applications.(1) Near-field coupling of a single nitrogen-vacancy center is achieved in a bottom-up approach by placing a preselected nanodiamond directly on the fiber facet. Its high photon collection efficiency is equivalent to a far-field collection via an objective with a numerical aperture of 0.82. Furthermore, simultaneous excitation and re-collection through the fiber is possible by introducing a fiber-connected single emitter sensor.
一种无定标、亚毫米级的单光子源，由光纤上的单个量子发射器组成，在室温下工作，已经得到了演示。它可以轻松集成到光纤网络中，用于量子密码学或量子计量学应用。(1) 通过将预先选择的纳米金刚石直接放在光纤端面上，采用自下而上的方法实现了单个氮空位中心的近场耦合。其高光子收集效率相当于通过数值孔径为 0.82 的远场收集。此外，通过引入光纤连接的单发射器传感器，可以实现通过光纤同时激发和再收集。
