Experimental demonstration of Fabry-Perot open resonators in a surface-wave bandgap crystal

• Main Authors: Gao, Zhen, Gao, Fei, Xu, Hongyi, Zhang, Youming, Zhang, Baile
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2017
• Subjects: Surface Plasmons; Surface Waves
• Online Access: https://hdl.handle.net/10356/86616; http://hdl.handle.net/10220/44178
• Institution: Nanyang Technological University

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.