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arXiv 1902.09002physics.opticsphysics.plasm-ph
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回转各向异性界面上的鲁棒表面等离激元极化激元

Robust surface plasmon polaritons on gyrotropic interfaces

Samaneh Pakniyat, Alexander M. Holmes, George W. Hanson, S. Ali Hassani Gangaraj, Mauro Antezza, Mario G. Silveirinha, Shahrokh Jam, Francesco Monticone

AI总结:

研究了回转各向异性介质与简单介质界面处基于双曲色散形成的单向表面等离激元极化激元,通过控制回旋频率或工作频率实现光束导向,并分析了体能带结构及有限厚度平板的格林函数与维持条件。

摘要:

在一种新近发现的频率区间内,研究了回转各向异性介质与简单介质界面处的单向表面等离激元极化激元(SPPs)。在该频率区间内,由于双曲色散,SPPs形成狭窄的类光束图案。通过控制回旋频率(外部偏置)或工作频率等参数,可以对SPP光束进行导向。我们考察了沿不同传播方向的体能带结构,以确定一个适用于所有传播方向的公共带隙,SPPs会穿过该带隙。此外,还考虑了有限厚度回转各向异性平板的情况,为此我们给出了格林函数,并考察了维持单向SPP所需的厚度和损耗水平。

英文摘要:

Unidirectional surface plasmon polaritons (SPPs) at the interface between a gyrotropic medium and a simple medium are studied in a newly-recognized frequency regime wherein the SPPs form narrow, beam-like patterns due to hyperbolic dispersion. The SPP beams are steerable by controlling parameters such as the cyclotron frequency (external bias) or the frequency of operation. The bulk band structure along different propagation directions is examined to ascertain a common bandgap, valid for all propagation directions, which the SPPs cross. The case of a finite-thickness gyrotropic slab is also considered, for which we present the Green function and examine the thickness and loss level required to maintain a unidirectional SPP.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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