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Bright and Dark Spatial Solitons in Metallic Nanowire Arrays

Fernandes, D. E. ; Silveirinha, M. G.

Photonics and Nanostructures - Fundamentals and Applications Vol. 12, Nº 4, pp. 340 - 349, August, 2014.

ISSN (print): 1569-4429
ISSN (online): 1569-4410

Journal Impact Factor: 1,505 (in 2015)

Digital Object Identifier: 10.1016/j.photonics.2014.04.003

Abstract
We investigate the formation and propagation of bright and dark three-dimensional unstaggered spatial solitons with cylindrical symmetry in a nonlinear nanowire metamaterial. The metamaterial is formed by metallic nanowires embedded in a Kerr-type dielectric host and is modeled using an effective medium approach. Our numerical calculations show that the confinement of the spatial-solitons results from the interplay of the host nonlinear response strength and the hyperbolic dispersion of the photonic states in the nanowire array. Subwavelength solitary beams may be observed for sufficiently strong nonlinearities.