Cross conversion between surface plasmon polaritons and quasicylindrical waves

X. Y. Yang 1 Haitao Liu 1 Philippe Lalanne 1
1 Laboratoire Charles Fabry de l'Institut d'Optique / Naphel
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
Abstract : The optical properties of textured metallic surfaces are governed by the scattering of surface plasmon polaritons (SPPs) and of quasicylindrical waves (CWs), which are both excited by the nano-objects located on the surface. We study here a fundamental scattering process of these fields, namely, the cross conversion of a CW into a SPP. We first show that this inelastic process is inevitable in multi-nano-object ensembles and then propose a procedure enabling a rigorous calculation of the cross conversion scattering coefficients. Additionally, by mapping this intricate process to a much simpler one, we derive general and simple expressions for the cross conversion efficiency. All predictions are carefully supported by fully vectorial computational results.
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X. Y. Yang, Haitao Liu, Philippe Lalanne. Cross conversion between surface plasmon polaritons and quasicylindrical waves. Physical Review Letters, American Physical Society, 2009, 102 (15), pp.153903. ⟨10.1103/PhysRevLett.102.153903⟩. ⟨hal-00570586⟩

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