THEORY OF NONLINEAR GUIDED AND SURFACE PLASMON–POLARITONS IN DIELECTRIC FILMS

S. Baher and M. G. Cottam ()
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S. Baher: Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada
M. G. Cottam: Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada

Surface Review and Letters (SRL), 2003, vol. 10, issue 01, 13-22

Abstract: Calculations are presented for the dispersion relations of nonlinear plasmon–polariton modes in a layered dielectric structure consisting of a film bounded on each side by another medium. At least one of the media is a metal or semiconductor (such as InSb) with a real, isotropic, frequency-dependent dielectric function, characteristic of an electron plasma. In addition, both media may have a Kerr-type nonlinearity in their dielectric functions. Hence the resulting plasmon–polaritons, which we study inspolarization, are nonlinear and are found to occur in multiple branches. The theory is illustrated by numerical solutions of the dispersion relations for several geometries and physical parameters, and a comparison is made with previous plasmon–polariton results for linear dielectric media as a special case.

Keywords: Nonlinear waves; surfaces; films; plasmon–polaritons; 42.65.Sf; 71.36.+c; 71.45.Gm; 73.43.Lp (search for similar items in EconPapers)
Date: 2003
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DOI: 10.1142/S0218625X03004573

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