Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-07-23
New J. Phys. 10, 105017 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
22 pages, 11 figures, revised version submitted to New Journal of Physics
Scientific paper
10.1088/1367-2630/10/10/105017
The scattering of light and surface plasmon polaritons (SPPs) by finite arrays of either holes or dimples in a metal film is treated theoretically. A modal expansion formalism, capable of handling real metals with up to thousands of indentations, is presented. Computations based on this method demonstrate that a single hole scatters a significant fraction of incoming light into SPPs. It is also observed that holes and dimples scatter SPPs into light with similar efficiencies, provided the depth of the dimple is larger than its radius. Finally, it is shown that in arrays the normalized-to-area emittances in the out-of-plane and SPP channels present different dependences with the number of holes.
Brucoli Giovanni
Garcia-Vidal Francisco J.
Leon-Perez Fernando de
Martin-Moreno Luis
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