Get access
Advanced Materials

Enhanced Light Focusing in Self-Assembled Optoplasmonic Clusters with Subwavelength Dimensions

Authors

  • Yan Hong,

    1. Department of Chemistry and The Photonics Center, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
    Search for more papers by this author
  • Mahshid Pourmand,

    1. Department of Chemistry and The Photonics Center, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
    Search for more papers by this author
  • Svetlana V. Boriskina,

    1. Department of Chemistry and The Photonics Center, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
    Search for more papers by this author
  • Björn M. Reinhard

    Corresponding author
    1. Department of Chemistry and The Photonics Center, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
    • Department of Chemistry and The Photonics Center, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA.
    Search for more papers by this author

Abstract

Compact metallo-dielectric hybrid clusters with subwavelength dimensions are fabricated by template guided self-assembly. Elastic and inelastic scattering spectroscopy and electromagnetic simulations reveal that hybrid clusters comprising TiO2 nanoparticles on top of a cluster of strongly coupled gold nanoparticles harness synergistic electromagnetic interactions between the building blocks. This results in a boost of the peak electric field intensity and a redistribution of the field in the ambient medium. The complex phase landscape in the clusters features optical vortices that enhance the magnetic field.

original image
Get access to the full text of this article

Ancillary