Cavity QED with Single NV Defect Centers and a Micro-toroidal Cavity

在这个项目中，我们想要实现一个新的空腔量子电动力学（CQED）控制实验系统。我们打算用环形微谐振器作为腔体，用纳米金刚石的单缺陷中心作为量子发射体。为了实现良好的可控结构，我们将使用扫描探针技术在环面支持的最大低语通道模式场内定位单个纳米金刚石。利用高效率的锥形光纤耦合器将光耦合进出各个模式，并使用单个纳米金刚石的共聚焦激发。将对腔体进行温度调谐，并对缺陷中心进行直流Stark调谐。我们将研究CQED的弱耦合和强耦合。我们首次将目标对准了具有两个量子发射体的CQED系统的受控组装。

Within this proposed project we would like to realize a novel system for controlled experiments in cavity quantum electrodynamics (CQED).We intend to use a toroidal microresonator as cavity and single defect centers in nano diamonds as quantum emitters. In order to realize a well controllable configuration we will use scanning probe techniques to position individual nano diamonds within the maximum field of whispering-gallery modes supported by the toroid. Light is coupled in and out of individual modes with the use of a tapered fiber coupler with high efficiency, and confocal excitation of individual nano diamonds is used. Temperature tuning of the cavity and DC Stark tuning of the defect centers will be implemented. We will investigate the weak as well as the strong coupling regime of CQED. For the first time we aim at controlled assembly of a CQED system with two quantum emitters.