Near-Infrared Tunable Surface Lattice Induced Transparency in a Plasmonic Metasurface

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Abstract

Collective coherent scattering at the surface of a plasmonic nanoparticle array is shown to induce tunable transparency windows at the localized plasmon band. Broadband phase measurements show that the enhanced transmission is accompanied by a large anomalous dispersion, which leads to a group delay as large as (Formula presented.) within only 40 nm thick sample. This effect occurs over a wide tunable spectral range of (Formula presented.), and appears for two distinct counter-propagating surface waves. The experimental observations are in good agreement with calculations based on coupled dipole approximation (CDA) and with finite-difference time-domain (FDTD) simulations. This study opens the door for implementation in the fields of sensing, displays, optical buffering, tunable filtering, and nonlinear optics.

Original languageEnglish
Article number1900204
JournalLaser and Photonics Reviews
Volume14
Issue number1
DOIs
StatePublished - 1 Jan 2020

Keywords

  • coherent interaction
  • electromagnetic induced transparency
  • localized surface plasmons
  • slow light
  • surface lattice resonance

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