Photonic-Band-Gap Materials Comprising Positive-Phase-Velocity And Negative-Phase-Velocity Layers in Waveguides

GOMEZ GOMEZ, ALVARO; MARTINEZ RICCI, MARIA LUZ; DEPINE, RICARDO; LAKHTAKIA,AKHLESH

JOURNAL OF MODERN OPTICS

Taylor and Francis

Año: 2009 vol. 56 p. 1688 - 1697

0950-0340

We have analyzed electromagnetic wave propagation in photonic bandgap (PBG) structures comprisingalternating layers of isotropic dielectric-magnetic materials with positive phase velocity and negative phasevelocity, implemented in different waveguides of uniform cross-section (parallel-plate, rectangular, circular,and coaxial) and perfectly conducting walls. The structures could be either ideal (i.e. of infinite extent along thewaveguide axis) or real (i.e. terminated at both ends with homogeneously filled waveguide sections). The spectrallocations of the band gaps do not directly depend on the cross-sectional shape and dimensions, but on the cut-offparameter instead, for ideal structures. The band gaps of an ideal structure are located in spectral regions wherethe reflectance of the corresponding real structure is large. The real structures show four types of band gaps,only one type of which is due to the periodically repetitive constitution of the PBG structure; the remaining threetypes are not of the Bragg type