Strongly Confined Spoof Surface Plasmon Polaritons Waveguiding Enabled by Planar Staggered Plasmonic Waveguides

• DOI: 10.1038/srep38528
• Publication Date: 2016-12-05T10:13:22Z
• Authors: Longfang Ye; Yifan Xiao; Yanhui Liu; Liang Zhang; Guoxiong Cai; Qing Huo Liu
• Keywords: Waveguide; Coplanar waveguide

Abstract We demonstrate a novel route to achieving highly efficient and strongly confined spoof surface plasmon polaritons (SPPs) waveguides at subwavelength scale enabled by planar staggered plasmonic (PSPWs). The structure of these new consists an ultrathin metallic strip with periodic double groove arrays supported flexible dielectric substrate, leading unique EM coupling waveguiding phenomenon. SPP propagation properties, including dispersion relations near field distributions, are numerically investigated. Furthermore, broadband coplanar waveguide (CPW) (PSPW) transitions designed achieve smooth momentum matching mode conversion. By applying transitions, CPW-PSPW-CPW is designed, fabricated measured verify the PSPW’s performance microwave frequencies. investigation results show proposed PSPWs have excellent deep SPPs confinement, long length low bend loss, as well great design flexibility engineer properties adjusting their geometry dimensions material parameters. Our work opens up avenue for development various advanced integrated devices circuits in terahertz regimes.