Investigation of Nonreciprocal Dispersion Phenomena in Anisotropic Periodic Structures Based on a Curvilinear FDFD Method

Panagiotis C. Theofanopoulos, Christos S. Lavranos, Kyriakos E. Zoiros, Georgios Trichopoulos, Gerard Granet, George A. Kyriacou

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The aim of this paper is the investigation of nonreciprocal phenomena in anisotropically loaded 2-D periodic structures. For this purpose, our well-established 2-D curvilinear finite difference frequency domain method is combined with periodic boundary conditions and extended toward the eigenanalysis of periodic structures loaded with both isotropic and general anisotropic materials. The periodic structures are simulated in a 2-D domain, while uniformity is considered along the third axis. The propagation constant along the third axis can either be zero (in-plane-propagation) or nonzero (out-of-plane propagation). Particular effort was devoted to the identification of the appropriate irreducible Brillouin zone to be scanned during the eigenanalysis. It was herein realized that similar to geometrically artificial crystal anisotropy, the wave propagation directional asymmetries modify the irreducible Brillouin zone in the microwave regime as well. Both gyrotropic and particularly magnetized ferrite as well as full tensor anisotropic (arbitrarily biased ferrite) material loadings are investigated through the eigenanalysis of different periodic structures, including strip grating. Interesting nonreciprocal backward wave and unidirectional phenomena are justified as expected.

Original languageEnglish (US)
JournalIEEE Transactions on Microwave Theory and Techniques
DOIs
StateAccepted/In press - Oct 26 2016

Fingerprint

Periodic structures
Brillouin zones
propagation
ferrites
Ferrite
backward waves
wave propagation
strip
asymmetry
gratings
tensors
Wave propagation
boundary conditions
Tensors
microwaves
anisotropy
Anisotropy
Microwaves
Boundary conditions
Crystals

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Investigation of Nonreciprocal Dispersion Phenomena in Anisotropic Periodic Structures Based on a Curvilinear FDFD Method. / Theofanopoulos, Panagiotis C.; Lavranos, Christos S.; Zoiros, Kyriakos E.; Trichopoulos, Georgios; Granet, Gerard; Kyriacou, George A.

In: IEEE Transactions on Microwave Theory and Techniques, 26.10.2016.

Research output: Contribution to journalArticle

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