META Conference, META'10

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Anisotropy of hybrid mode admittance
Alexander Mikhailovich Merzlikin, Alexey Petrovich Vinogradov, Andrey Nikolaevich Lagarkov, Miguel Levy, David J. Bergman, Yakov M. Strelniker

Last modified: 2009-11-04

Abstract


This communication devoted to investigation of electromagnetic wave propagation and localization into periodic structure made of anisotropic and gyrotropic layers.
It is shown that hybrid wave, which is an eigensolution in anisotropic/gyrotropic periodical system, may be described in term of admittance, but contrary to the isotropic case it is tenser quantity.
It is shown that gyrotropy, anisotropy and periodicity results in formation of a band gap of new type, so-called degenerate band gap. The edges of this band gap are degenerated with respect to polarization. It is shown that if the frequency of the Tamm state lies in the degenerated band gap then its structure qualitatively differs from the structure of a well-known Tamm state localized at the interface between two 1D PC made of isotropic materials. As a consequence of anisotropy of admittance to construct such a Tamm state at least three evanescent Bloch waves are demanded. The new condition for Tamm states is deduced.