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Bright and dark spatial solitons in metallic nanowire arrays |
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| Institution: | 1. Univ. Paris-Sud, Institut d’Electronique Fondamentale, UMR 8622, 91405 Orsay Cedex, France;2. CNRS, Orsay F-91405, France;3. Laboratoire Charles Fabry, IOGS, CNRS, Univ. Paris-Sud, 2 Ave A. Fresnel, 91127 Palaiseau Cedex, France;1. Department of Physics, Presidency College, Chennai 600005, India;2. Department of Physics, Anna University, Chennai 600025, India;1. Laboratoire Matériaux Molécules et Applications, IPEST, Université de Carthage, La Marsa, Tunisia;2. CNRS, UMR7588, Institut des Nanosciences de Paris, 4 place Jussieu, 75005 Paris, France;3. Sorbonne Universités, UPMC Université Paris 06, UMR7588, 4 place Jussieu, 75005 Paris, France;4. Laboratoire de Photonique et de Nanostructures – CNRS, Route de Nozay, 91460 Marcoussis, France |
| 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. Unlike conventional Kerr media, the metamaterial supports bright solitons when the host is a self-defocusing material and dark solitons when the host is a self-focusing material. 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. |
| Keywords: | Metamaterials Spatial solitons Bright solitons Dark solitons Effective medium theory Nanowire array |
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