Nanoscale chemical mapping using three-dimensional adiabatic compression of surface plasmon polaritons

Francesco De Angelis*, Gobind Das, Patrizio Candeloro, Maddalena Patrini, Matteo Galli, Alpan Bek, Marco Lazzarino, Ivan Maksymov, Carlo Liberale, Lucio Claudio Andreani, Enzo Di Fabrizio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

352 Scopus citations


The fields of plasmonics, Raman spectroscopy and atomic force microscopy have recently undergone considerable development, but independently of one another. By combining these techniques, a range of complementary information could be simultaneously obtained at a single molecule level. Here, we report the design, fabrication and application of a photonic-plasmonic device that is fully compatible with atomic force microscopy and Raman spectroscopy. Our approach relies on the generation and localization of surface plasmon polaritons by means of adiabatic compression through a metallic tapered waveguide to create strongly enhanced Raman excitation in a region just a few nanometres across. The tapered waveguide can also be used as an atomic force microscope tip. Using the device, topographic, chemical and structural information about silicon nanocrystals may be obtained with a spatial resolution of 7nm.

Original languageEnglish (US)
Pages (from-to)67-72
Number of pages6
JournalNature nanotechnology
Issue number1
StatePublished - Jan 2010
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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