Coupling between plane waves and Bloch waves in photonic crystals with negative refraction

Z. Ruan, M. Qiu, Sanshui Xiao, S. He, L. Thylen

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A comprehensive analysis of the coupling coefficients between plane waves in conventional dielectric media and Bloch waves of photonic crystals with effective negative refractions is performed by the layer Korringa-Kohn-Rostoker method. Employing the infinite layers refraction operator, semi-infinite size photonic crystals are considered. Some special coupling properties are discussed. In particular, the strong angular dependence of coupling coefficients is found even for an interface between air (n=1) and a photonic crystal with effective refractive index (n(eff)=-1). Thus, a negative refractive index defined by the radius of a circular equal-frequency contour does not guarantee an isotropic behavior.
Original languageEnglish
Article number045111
JournalPhysical Review B Condensed Matter
Issue number4
Number of pages7
Publication statusPublished - 2005
Externally publishedYes

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