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Propagation of Dyakonon Wave-Packets at the Boundary of Metallodielectric Lattices

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4 Author(s)
Zapata-Rodriguez, C.J. ; Dept. of Opt., Univ. of Valencia, Valencia, Spain ; Miret, J.J. ; Sorni, J.A. ; Vukovic, S.

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.

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:19 ,  Issue: 3 )