Design and experimental investigation of a chiral plasmonic nanotaper

Leeju Singh, Yuri Gorodetski

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The phenomena of coupling between light and surface plasmon polaritons requires specific momentum matching conditions. In the case of a single scattering object on a metallic surface, like a nanoparticle or a nanohole, the coupling between a broadband effect, i.e. scattering, and a discrete one such as surface plasmon excitation, leads to Fano-like plasmonic resonance line-shapes. The necessary phase matching requirements can be used to engineer the light-plasmon coupling and to achieve a directional plasmonic excitation. Here we investigate this effect by using a chiral nanotip to excite surface plasmons with a strong spin-dependent azimuthal variation. This effect can be described by a Fano-like interference with a complex coupling factor that can be modified thanks to a symmetry breaking nanostructure.

Original languageEnglish
Title of host publicationMetamaterials XIII
EditorsVladimir Kuzmiak, Peter Markos, Tomasz Szoplik
PublisherSPIE
ISBN (Electronic)9781510643727
DOIs
StatePublished - 2021
EventMetamaterials XIII 2021 - Virtual, Online, Czech Republic
Duration: 19 Apr 202123 Apr 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11769
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceMetamaterials XIII 2021
Country/TerritoryCzech Republic
CityVirtual, Online
Period19/04/2123/04/21

Keywords

  • Chiral
  • Directional-excitation
  • Nanotip
  • Plasmonics
  • Symmetry-breaking

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