标题： 与圆形纳米天线耦合的量子发射器用于高亮度量子光源 显示英文标题

标题： Quantum emitters coupled to circular nanoantennas for high brightness quantum light sources

摘要： 工程化量子光源的方向性和发射速率在现代量子应用的发展中至关重要。在本工作中，我们使用数值计算来优化位于混合金属-介质圆形周期纳米天线中的宽带量子发射器的亮度。优化后的结构具有74%（82%）的光子收集效率和超过10（6）的光子通量增强，分别进入数值孔径为0.22（0.50），对应于直接耦合到两种类型的多模光纤。为了增强发射速率，我们提出了一种新的圆形纳米天线设计，其中量子发射器被连接到天线中心的银纳米圆锥体上。优化后，我们发现数值孔径为0.22（0.50）的收集效率为61%（78%），对于非偏振发射器，亮度增强了1000（600）。两种结构的增强都是宽带的，由于器件的低品质因数，因此非常适合室温光源。这种可扩展的设计可用于片上、室温运行的高亮度量子光源。 显示英文摘要

摘要： Engineering the directionality and emission rate of quantum light sources is essential in the development of modern quantum applications.In this work we use numerical calculations to optimize the brightness of a broadband quantum emitter positioned in a hybrid metal-dielectric circular periodic nanoantenna. The optimized structure features a photon collection efficiency of 74% (82%) and a photon flux enhancement of over 10 (6) into a numerical aperature of 0.22 (0.50) respectively, corresponding to a direct coupling into two types of multimode fibers. In order to enhance the emission rate, we present a new circular nanoantenna design where a quantum emitter is attached to a silver nanocone at the center of the antenna. After optimization, we find a collection efficiency of 61% (78%) into a numerical aperature of 0.22 (0.50), giving a brightness enhancement of 1000 (600) for an unpolarized emitter. The enhancements in both structures are broadband due to the low quality factor of the device and are therefore ideal for room-temperature sources. This type of a scalable design can be utilized towards on-chip, high brightness quantum light sources operating at room temperature.