Cooperative interactions between nano-antennas in a high-Q cavity for unidirectional light sources.,Light: Science & Applications

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Cooperative interactions between nano-antennas in a high-Q cavity for unidirectional light sources.
Light: Science & Applications ( IF 20.6 ) Pub Date : 2019-12-11 , DOI: 10.1038/s41377-019-0227-x
Kévin G Cognée _{1,

2} , Hugo M Doeleman _{1,

3} , Philippe Lalanne ₂ , A F Koenderink _{1,

3}

Affiliation

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.

中文翻译：

高Q腔中的纳米天线之间的协作相互作用，用于单向光源。

我们分析了高Q混合等离子-光子谐振器的谐振模式结构和状态局部密度，该谐振器由电介质微盘与成对的等离激元天线杂交而成，这些谐振器通过腔模在系统中扫过位置。一方面，该系统是通过谐振腔模式的协同谐振偶极子-偶极子相互作用的经典实现，如通过预测和测量的谐振线宽和频移所证明的那样。同时，我们的工作将“相控阵”天线物理学的概念引入了等离子体光子共振器中。我们预测，可能会构造出较大的局部状态密度（LDOS）增强，超过单个天线所给出的增强，从与向腔体中单向注入荧光相关的意义上讲，这是“手性的”。我们报告了一个实验，研究了用铝天线二聚体装饰的氮化硅微盘的共振。测量结果直接确定了偶极天线的预计协同效应，该效应是天线间距对混合模式质量因数和谐振条件的函数。

更新日期：2019-12-11

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