Clarification of surface modes of a periodic nanopatch metasurface.


Journal Article

We study the angle-dependent optical reflectance spectrum of a metasurface consisting of a periodic array of film-coupled plasmonic nanopatch particles. The nanopatch metasurface exhibits a strong, angle-independent absorption resonance at a wavelength defined by the nanopatch geometry and relative density. When the nanopatches are arranged in a regular lattice, a second, sharp absorption dip is present that varies strongly as a function of the incidence angle. This second resonance is a collective effect involving the excitation of surface plasmon modes and relates to a Wood's anomaly. Using an analytical model, we compute the surface modes of the structure and confirm details about the various mechanisms that contribute to the reflection spectra. The measured reflectance spectra are in excellent agreement with both analytical calculations and full-wave numerical simulations.

Full Text

Duke Authors

Cited Authors

  • Jia, X; Bowen, P; Huang, Z; Liu, X; Bingham, C; Smith, DR

Published Date

  • February 2018

Published In

Volume / Issue

  • 26 / 3

Start / End Page

  • 3004 - 3012

PubMed ID

  • 29401833

Pubmed Central ID

  • 29401833

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

International Standard Serial Number (ISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/oe.26.003004


  • eng