Second harmonic generation circul dichroism in Au coated GaAs-based nanowires

Alessandro Belardini, Joel T. Collins, David C. Hooper, Grigore Leahu, Emilija Petronijevic, Marco Centini, Roberto Li Voti, Teemu Hakkarainen, Eero Koivusalo, Marcelo Rizzo Piton, Soile Soumalainen, Mircea Guina, Ventsislav K. Valev, Concita Sibilia

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Nanostructures with broken symmetry can interact with circularly polarized light to mimic chiroptical (chiral-optical) effects, usually observable in chiral media. This phenomenon is known as extrinsic chirality. Second harmonic generation (SHG) is extremely sensitive to symmetry breaking, down to a single atomic monolayer and it has been extensively used as a probe of extrinsic chirality. Here we present SHG measurements of GaAs nanowires partially covered with Au, fabricated by a self-catalysed technique. The Au coated GaAs nanowires give rise to a dramatic circular dichroism in the generated second harmonic signal, compared to nanowires without coating.

Original languageEnglish
Title of host publication20th Italian National Conference on Photonic Technologies (Fotonica 2018)
PublisherInstitution of Engineering and Technology
EditionCP748
ISBN (Electronic)978-1-78561-991-5
ISBN (Print)9781785617911
DOIs
Publication statusPublished - 16 May 2019
Event20th Italian National Conference on Photonic Technologies, Fotonica 2018 - Lecce, Italy
Duration: 23 May 201825 May 2018

Publication series

NameIET Conference Publications
NumberCP748
Volume2018

Conference

Conference20th Italian National Conference on Photonic Technologies, Fotonica 2018
CountryItaly
CityLecce
Period23/05/1825/05/18

Keywords

  • Extrinsic chirality
  • GaAs nanowires
  • Plasmonic coating
  • Second harmonic generation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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