title: Bloch vector dependence of the plasma frequency in metallic photonic crystals.
abstract: In this paper, a wire mesh metallic photonic crystal is modelized as a stack of gratings of period d made of very thin infinitely metallic rods (the conductivity is assumed to be infinite) of radius a (a<<d) . This structure is illuminated by a s-polarized plane wave of wavelength lambda. First, we give the diffracted field in closed form for very large wavelengths compared to the period (lambda>>d) . We derive a very accurate formula for the cut wavelength and we show that the plasma frequency in wire photonic crystals depends upon the Bloch vector. This latest formula is checked numerically.
authors.affiliation: Institut Fresnel, UMR 6133, Case 161, Université Aix-Marseille I, Av. Escadrille Normandie Niemen, 13 397 Marseille Cedex 20, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Zolla
authors.forename: Didier
authors.initials: D
authors.lastname: Felbacq
authors.forename: Guy
authors.initials: G
authors.lastname: Bouchitté