Title :
Propagation of Dyakonon Wave-Packets at the Boundary of Metallodielectric Lattices
Author :
Zapata-Rodriguez, Carlos J. ; Miret, Juan J. ; Sorni, J.A. ; Vukovic, Slobodan
Author_Institution :
Dept. of Opt., Univ. of Valencia, Valencia, Spain
Abstract :
We rigorously analyze the propagation of localized surface waves that takes place at the boundary between a semi-infinite layered metal-dielectric (MD) nanostructure cut normally to the layers and a isotropic medium. It is demonstrated that Dyakonov-like surface waves (also coined dyakonons) with hybrid polarization may propagate in a wide angular range. As a consequence, dyakonon-based wave-packets (DWPs) may feature subwavelength beamwidths. Due to the hyperbolic-dispersion regime in plasmonic crystals, supported DWPs are still in the canalization regime. The apparent quadratic beam spreading, however, is driven by dissipation effects in metal.
Keywords :
light propagation; nanophotonics; plasmonics; Dyakonon wave-packets; Dyakonov-like surface waves; canalization regime; coined dyakonons; dissipation effects; hybrid polarization; hyperbolic-dispersion regime; isotropic medium; localized surface waves; metallodielectric lattices; plasmonic crystals; quadratic beam spreading; semi-infinite layered metal-dielectric nanostructure; subwavelength beamwidths; Dispersion; Lattices; Materials; Metals; Optical surface waves; Plasmons; Surface waves; Birefringence; electromagnetic wave propagation; surface plasmons;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2012.2230153