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

  1. Yan Hong,
  2. Mahshid Pourmand,
  3. Svetlana V. Boriskina,
  4. Björn M. Reinhard*

Article first published online: 11 OCT 2012

DOI: 10.1002/adma.201202830

Issue

Advanced Materials

Advanced Materials

Volume 25, Issue 1, pages 115–119, January 4, 2013

Additional Information

How to Cite

Hong, Y., Pourmand, M., Boriskina, S. V. and Reinhard, B. M. (2013), Enhanced Light Focusing in Self-Assembled Optoplasmonic Clusters with Subwavelength Dimensions. Adv. Mater., 25: 115–119. doi: 10.1002/adma.201202830

Author Information

  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.

Publication History

  1. Issue published online: 2 JAN 2013
  2. Article first published online: 11 OCT 2012
  3. Manuscript Revised: 23 AUG 2012
  4. Manuscript Received: 13 JUL 2012

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Keywords:

  • self-assembly;
  • SERS;
  • optical vortex;
  • photonic-plasmonic resonances;
  • magnetic field enhancement
Thumbnail image of graphical 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.

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