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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Modulation of surface plasmon coupling-in by one-dimensional surface corrugation

F López-Tejeira1, Sergio G Rodrigo1, L Martín-Moreno1,9, F J García-Vidal2, E Devaux3, J Dintinger3,7, T W Ebbesen3, J R Krenn4, I P Radko5, S I Bozhevolnyi5, M U González6,8, J C Weeber6 and A Dereux6

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Surface plasmon-polaritons have recently attracted renewed interest in the scientific community for their potential in sub-wavelength optics, light generation and non-destructive sensing. Given that they cannot be directly excited by freely propagating light due to their intrinsic binding to the metal surface, the light–plasmon coupling efficiency becomes of crucial importance for the success of any plasmonic device. Here, we present a comprehensive study on the modulation (enhancement or suppression) of such a coupling efficiency by means of one-dimensional surface corrugation. Our approach is based on simple wave interference and enables us to make quantitative predictions which have been experimentally confirmed at both the near-infrared and telecom ranges.


PACS

73.20.Mf Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)

68.47.De Metallic surfaces

71.36.+c Polaritons (including photon-phonon and photon-magnon interactions)

Subjects

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Dates

Issue 3 (March 2008)

Received 21 December 2007

Published 27 March 2008



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