Cooperative interactions between nano-antennas in a high-Q cavity for unidirectional light sources
Cooperative interactions between nano-antennas in a high-Q cavity for unidirectional light sources
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DOI：
10.1038/s41377-019-0227-x
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发表时间：
2019-12-11
影响因子：
19.4
通讯作者：
Koenderink, A. F.
中科院分区：
文献类型：
--
作者：
Cognee, Kevin G.;Doeleman, Hugo M.;Koenderink, A. F.
我们分析了高Q混合等离子体激元-光子谐振器的谐振模结构和局部态密度，该谐振器由与等离子体激元天线对混合的电介质微盘组成，这些天线对通过腔模系统地扫描到位。一方面，该系统是通过腔模式的合作共振偶极-偶极相互作用的经典实现，通过预测和测量的共振线宽和位移是显而易见的。同时，我们的工作将相控阵天线物理的概念引入等离子体光子谐振器。我们预测，人们可以构建大的局域态密度（LDOS）增强超过由单个天线，这是“手性”的意义上的相关的荧光到腔体中的单向注入。我们报告了一个实验探测的共振的氮化硅微盘装饰铝天线二聚体。测量直接证实了耦合偶极天线作为混合模式质量因子和谐振条件的天线间距的函数的预测的合作效果。
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.