Ellipsometric determination of permittivity in a negative index photonic crystal metamaterial

Principia Dardano; Massimo Gagliardi; Ivo Rendina; Stefano Cabrini; Vito Mocella

doi:10.1038/lsa.2012.42

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Ellipsometric determination of permittivity in a negative index photonic crystal metamaterial

Original Article

- Ellipsometric determination of permittivity in a negative index photonic crystal metamaterial
- Light: Science & Applications Vol. 1, Issue 1, (2012)
- Affiliations：
  
  1.Institute for microelectronics and microsystems, National Council of Research, Department of Naples, Naples 80131, Italy
  2.Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Author bio：
  
  Dr V Mocella, Institute for microelectronics and microsystems, National Council of Research, Department of Naples, Naples 80131, Italy E-mail: vito.mocella@na.imm.cnr.it
- Funds：
- DOI：10.1038/lsa.2012.42
  CLC：
- Published：2012-03，
  
  Published Online：21 December 2012，
  
  Received：21 March 2012，
  
  Revised：30 July 2012，
  
  Accepted：13 August 2012
- Accepted：
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Dardano, P. et al. Ellipsometric determination of permittivity in a negative index photonic crystal metamaterial. Light: Science & Applications, 1, e42 (2012).
DOI：

Dardano, P. et al. Ellipsometric determination of permittivity in a negative index photonic crystal metamaterial. Light: Science & Applications, 1, e42 (2012). DOI： 10.1038/lsa.2012.42.

摘要

Abstract

In this work

we present the first experimental evidence of negative dielectric susceptibility in a two-dimensional silicon photonic crystal (PhC) with negative refractive index behavior. In the frequency range in which the effective refractive index

eff

is equal to −1

the incident light couples efficiently to the guided modes in the top surface layer of the PhC metamaterial. These modes resemble surface plasmon polariton resonances. This finding was confirmed by ellipsometric measurements

demonstrating the isotropy of the PhC resonances. Such negative index PhC materials may be of use in biosensing applications.

关键词

Keywords

diffraction gratingsmetamaterialsphotonic crystals

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Related Institution

CNR-IMM-Unità di Napoli, Napoli

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