Optical surface waves over metallo-dielectric nanostructures: Sommerfeld integrals revisited

Details Optical surface waves over metallo-dielectric nanostructures: Sommerfeld integrals revisited Optical surface waves over metallo-dielectric nanostructures: Sommerfeld integrals revisited

2008-03-12

arxiv.org/abs/0803.1696v3

Physics

Optics

13 pages, 7 figures. To appear in Optics Express Vol. 16, No. 12

Scientific paper

10.1364/OE.16.009073

The asymptotic closed-form solution to the fundamental diffraction problem of a linear horizontal Hertzian dipole radiating over the metallo-dielectric interface is provided. For observation points just above the interface, we confirm that the total surface near-field is the sum of two components: a long-range surface plasmon polariton and a short-range radiative cylindrical wave. The relative phases, amplitudes and damping functions of each component are quantitatively elucidated through simple analytic expressions for the entire range of propagation: near and asymptotic. Validation of the analytic solution is performed by comparing the predictions of a dipolar model with recently published data

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