High-Order Mode Application of Spoof Surface Plasmon Polaritons in Bandpass Filter Design

Yiqun Liu, Kai Da Xu, Ying Jiang Guo, Qiang Chen

Research output: Contribution to journalArticlepeer-review

Abstract

In this letter, high-order mode dispersion of a novel spoof surface plasmon polariton (SSPP) unit cell is reported, which has excellent bandpass propagation feature. Its asymptotic frequency and intersection frequency with light line can be independently manipulated by changing the geometric parameters of the slot in proposed SSPP unit cell. In order to validate the feasibility of high-order mode of SSPPs applied in the design of bandpass filters, two SSPP waveguides based on the method with different bandwidths are fabricated and measured. No mode-conversion transition part is introduced in the procedure of waveguide design which avoids extra addition of layout area and reduces complexity of devices. The measurements show that the proposed SSPP waveguide based on high-order mode characteristics can achieve bandpass signal propagation smoothly with controllable bandwidth.

Original languageEnglish
Article number9370120
Pages (from-to)362-365
Number of pages4
JournalIEEE Photonics Technology Letters
Volume33
Issue number7
DOIs
Publication statusPublished - 2021 Apr 1

Keywords

  • High order mode
  • bandpass filter
  • spoof surface plasmon polaritons
  • waveguide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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