Cognée Kévin G, Doeleman Hugo M, Lalanne Philippe, Koenderink A F
1Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
LP2N, Institut d'Optique Graduate School, CNRS, University of Bordeaux, 33400 Talence, France.
Light Sci Appl. 2019 Dec 11;8:115. doi: 10.1038/s41377-019-0227-x. eCollection 2019.
We analyse the resonant mode structure and local density of states in high-Q hybrid plasmonic-photonic resonators composed of dielectric microdisks hybridized with pairs of plasmon antennas that are systematically swept in position through the cavity mode. On the one hand, this system is a classical realization of the cooperative resonant dipole-dipole interaction through a cavity mode, as is evident through predicted and measured resonance linewidths and shifts. At the same time, our work introduces the notion of 'phased array' antenna physics into plasmonic-photonic resonators. We predict that one may construct large local density of states (LDOS) enhancements exceeding those given by a single antenna, which are 'chiral' in the sense of correlating with the unidirectional injection of fluorescence into the cavity. We report an experiment probing the resonances of silicon nitride microdisks decorated with aluminium antenna dimers. Measurements directly confirm the predicted cooperative effects of the coupled dipole antennas as a function of the antenna spacing on the hybrid mode quality factors and resonance conditions.
我们分析了由介电微盘与等离子体天线对杂交而成的高Q值混合等离子体-光子谐振器中的谐振模式结构和局域态密度，其中等离子体天线对在腔模中进行系统的位置扫描。一方面，该系统是通过腔模实现协同谐振偶极-偶极相互作用的经典实例，这从预测和测量的谐振线宽及频移中可以明显看出。同时，我们的工作将“相控阵”天线物理概念引入了等离子体-光子谐振器。我们预测，可以构建出超过单个天线所产生的局域态密度（LDOS）增强，这种增强在与单向荧光注入腔相关的意义上是“手性的”。我们报告了一项探测装饰有铝天线二聚体的氮化硅微盘谐振的实验。测量结果直接证实了耦合偶极天线的预测协同效应，该效应是混合模式品质因数和谐振条件的函数，与天线间距有关。
