Efficient Routing of Single Photons by One Atom and a Microtoroidal Cavity
Efficient Routing of Single Photons by One Atom and a Microtoroidal Cavity
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DOI：
10.1103/physrevlett.102.083601
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发表时间：
2009-02-27
影响因子：
8.6
通讯作者：
Kimble, H. J.
中科院分区：
文献类型：
--
作者：
Aoki, Takao;Parkins, A. S.;Kimble, H. J.
通过光纤耦合微环形腔与单个铯原子相互作用，来自相干输入的单光子被有效地重定向到单独的输出。通过在锥形光纤的输入-输出过耦合机制下操作，我们的系统可以作为一个高效的量子路由器来进行光子排序。单光子被反射，多余的光子被透射，这一点通过对反射（透射）光的光子反聚束（聚束）的观测得到了证实。我们的光子路由器对原子位置和输入功率的大变化是鲁棒的，所观察到的光子反聚束持续为腔内光子数0.03小于或类似于（n）在酒吧小于或类似于0.7。
Single photons from a coherent input are efficiently redirected to a separate output by way of a fiber-coupled microtoroidal cavity interacting with individual cesium atoms. By operating in an overcoupled regime for the input-output to a tapered fiber, our system functions as a quantum router with high efficiency for photon sorting. Single photons are reflected and excess photons transmitted, as confirmed by observations of photon antibunching (bunching) for the reflected (transmitted) light. Our photon router is robust against large variations of atomic position and input power, with the observed photon antibunching persisting for intracavity photon number 0.03 less than or similar to(n)over bar less than or similar to 0.7.