Cylindrical periodic surface lattice as a metadielectric: concept of a surface-field Cherenkov source of coherent radiation

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Abstract

A two-dimensional (2D), cylindrical, periodic surface lattice (PSL) forming a surface field cavity is considered. The lattice is created by introducing 2D periodic perturbations on the inner surface of a cylindrical waveguide. The PSL facilitates a resonant coupling of the surface and near cutoff volume fields, leading to the formation of a high-Q cavity eigenmode. The cavity eigenmode is described and investigated using a modal approach, considering the model of a cylindrical waveguide partially loaded with a metadielectric. By using a PSL-based cavity, the concept of a high-power, 0.2-THz Cherenkov source is developed. It is shown that if the PSL satisfies certain defined conditions, single-mode operation is observed.

Original languageEnglish
Article number013826
Number of pages12
JournalPhysical Review A
Volume84
Issue number1
DOIs
Publication statusPublished - 25 Jul 2011

Keywords

  • band gap structures
  • plasmon polaritons
  • excitation
  • two dimensional Bragg
  • 2-D Bragg
  • periodic surface lattice
  • Cherenkov maser
  • metadielectric
  • high-Q cavity
  • relativistic electron beam tubes
  • electron beams
  • vacuum electronics
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