Efficient unidirectional polarization-controlled excitation of surface plasmon polaritons

Anders Pors; Michael G Nielsen; Thomas Bernardin; Jean-Claude Weeber; Sergey I Bozhevolnyi

doi:10.1038/lsa.2014.78

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Efficient unidirectional polarization-controlled excitation of surface plasmon polaritons

Original Articles

- Efficient unidirectional polarization-controlled excitation of surface plasmon polaritons
- Light: Science & Applications Vol. 3, Issue 3, (2014)
- Affiliations：
  
  1.Department of Technology and Innovation, University of Southern Denmark, Odense, Denmark
  2.LICB, UMR 6303 CNRS – University of Burgundy, F-21078 Dijon, France
- Author bio：
  
  Professor SI Bozhevolnyi, Department of Technology and Innovation, University of Southern Denmark, Niels Bohrs Allé 1, DK-5230 Odense M, Denmark Email: seib@iti.sdu.dk
- Funds：
- DOI：10.1038/lsa.2014.78
  CLC：
- Published：2014-09，
  
  Published Online：15 August 2014，
  
  Received：23 November 2013，
  
  Revised：07 May 2014，
  
  Accepted：13 May 2014
- Accepted：
Scan QR Code
Pors, A. et al. Efficient unidirectional polarization-controlled excitation of surface plasmon polaritons. Light: Science & Applications, 3, e197 (2014).
DOI：

Pors, A. et al. Efficient unidirectional polarization-controlled excitation of surface plasmon polaritons. Light: Science & Applications, 3, e197 (2014). DOI： 10.1038/lsa.2014.78.

摘要

Abstract

Efficient excitation of surface plasmon polaritons (SPPs) remains one of the most challenging issues in areas of plasmonics related to information communication technologies. In particular

combining high SPP excitation efficiency and acceptance of any polarization of incident light appeared to be impossible to attain due to the polarized nature of SPPs. Here we demonstrate plasmonic couplers that represent arrays of gap SPP resonators producing upon reflection two orthogonal phase gradients in respective linear polarizations of incident radiation. These couplers are thereby capable of efficiently converting incident radiation with arbitrary polarization into SPPs that propagate in orthogonal directions dictated by the phase gradients. Fabricated couplers operate at telecom wavelengths and feature the coupling efficiency of ~25% for either of two linear polarizations of incident radiation and directivity of SPP excitation exceeding 100. We further demonstrate that an individual wavelength-sized unit cell

representing a meta-scatterer

can also be used for efficient and polarization sensitive SPP excitation in compact plasmonics circuits.

关键词

Keywords

gap surface plasmonsmetamaterialsmetasurfacessurface plasmon polaritons

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