Giant Nonlinear Optical Activity of Achiral Origin in Planar Metasurfaces with Quadratic and Cubic Nonlinearities

Adv Mater. 2016 Apr 20;28(15):2992-9. doi: 10.1002/adma.201505640. Epub 2016 Feb 23.

Abstract

3D chirality is shown to be unnecessary for introducing strong circular dichroism for harmonic generations. Specifically, near-unity circular dichroism for both second-harmonic generation and third-harmonic generations is demonstrated on suitably designed ultrathin plasmonic metasurfaces with only 2D planar chirality. The study opens up new routes for designing chip-type biosensing platform, which may allow for highly sensitive detection of bio- and chemical molecules with weak chirality.

Keywords: circular dichroism; metasurfaces; nonlinear optics; plasmonic.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Circular Dichroism
  • Light
  • Models, Molecular
  • Molecular Conformation
  • Nanostructures / chemistry*
  • Nonlinear Dynamics*
  • Optical Phenomena*
  • Rotation
  • Surface Properties