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Plasmonics

, Volume 7, Issue 4, pp 701–707 | Cite as

Exciting Surface Plasmons with Transformation Media

  • Carlos García-Meca
  • Rubén Ortuño
  • Javier Martí
  • Alejandro Martínez
Article

Abstract

We present a way of exciting surface plasmon polaritons along non-patterned metallic surfaces by means of a flat squeezing slab designed with transformation optics. The slab changes the dispersion relation of incident light, enabling evanescent coupling to propagating surface plasmons. Unlike prism couplers, the proposed device does not introduce reflections at its input interface. Moreover, its compact geometry is suitable for integration. A feasible dielectric implementation of the coupler is suggested. Finally, we show that the angular response of the device can be engineered by using a non-uniform compression factor. As an example, we design a coupler with a half-power angular bandwidth 2.5 times higher than that of a conventional dielectric coupler.

Keywords

Surface plasmon polaritons Transformation optics Metamaterials Couplers Broadband 

Notes

Acknowledgments

Financial support by Spanish Ministerio de Ciencia e Innovación (contracts CSD2008-00066 and TEC2008-06871-C02, and FPU grant) is gratefully acknowledged.

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Carlos García-Meca
    • 1
  • Rubén Ortuño
    • 1
  • Javier Martí
    • 1
  • Alejandro Martínez
    • 1
  1. 1.Nanophotonics Technology Center (NTC)Universitat Politecnica de ValenciaValenciaSpain

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