We report on the proposal and experimental realization of a type of retardation-based Fabry-Perot (FP) open resonator in a surface-wave bandgap crystal implemented on a single structured metal surface. This surface-wave FP open resonator is formed by introducing a finite line defect in the surface-wave bandgap crystal, whose resonance frequencies lie exactly within the forbidden bandgap of the surrounding crystal. Due to the complete surface-wave forbidden bandgap, a new FP plasmonic resonance mode exhibiting monopolar features which is missing in both traditional FP resonators and plasmonic resonators is emerged. Near-field response spectra and imaged mode profiles are presented to characterize the properties of these FP open resonators in the microwave regime.

中文翻译：

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法布里-珀罗开式谐振器在表面波带隙晶体中的实验演示

我们报告了在单个结构化金属表面上实现的表面波带隙晶体中的一种基于延迟的法布里-珀罗 (FP) 开式谐振器的提议和实验实现。这种表面波 FP 开路谐振器是通过在表面波带隙晶体中引入有限线缺陷而形成的，其谐振频率恰好位于周围晶体的禁带隙内。由于完整的表面波禁带隙，出现了一种新的 FP 等离子体共振模式，该模式表现出传统 FP 共振器和等离子体共振器中都没有的单极特征。近场响应光谱和成像模式分布被提出来表征这些 FP 开放谐振器在微波领域的特性。