Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures

Ventsislav K. Valev, Edward J. Osley, Ben De Clercq, Alejandro V. Silhanek, Paul A. Warburton, Oleg A. Aktsipetrov, Marcel Ameloot, Victor V. Moshchalkov, Thierry Verbiest

Research output: Chapter or section in a book/report/conference proceedingChapter in a published conference proceeding


We report our latest results on second harmonic generation (SHG) microscopy from arrays of G-shaped chiral gold nanostructures. The nanostructures are arranged in unit cells composed of four Gs, each rotated at 90° with respect to its neighbors. As it has already been demonstrated, for linearly polarized light, these unit cells yield a pattern of four SHG hotspots. However, upon increasing the pitch of the nanostructured arrays, extra hotspots can be observed at the edges of the unit cells. While the origin of these extra hotspots remains to be elucidated, their position indicates a relationship to coupling behavior between the unit cells.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 11 Jul 2012
EventMetamaterials VII - Brussels, UK United Kingdom
Duration: 16 Apr 201219 Apr 2012


ConferenceMetamaterials VII
Country/TerritoryUK United Kingdom


  • chirality
  • metamaterials
  • nanoscience
  • nanostructures
  • nonlinear optics
  • plasmonics
  • Second Harmonic Generation
  • SHG


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