Adiabatic compression of surface plasmon polaritons for label-free few molecules detection by means of Raman scattering

F. De Angelis*, Gobind Das, P. Candeloro, Carlo Liberale, F. Mecarini, A. Pujia, Enzo Di Fabrizio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In this paper we report the fabrication and characterization of a plasmonic device for label-free detection of few molecules in sub-wavelength regime by means of Raman scattering. The device is based on the coupling between a gold nanocone and a photonic crystal cavity, that is able to excite surface plasmon polaritons (SPPs) at the base on the cone. During the propagation toward the tip of the cone, the SPPs experiment and adiabatic compression that allow the accumulation of a very high electric field at the tip end. Raman enhancement factor of more than five order of magnitude is reported for a tip with a radius of curvature of about 10 nm. The present results open up future perspective on single molecule detection even in combination with AFM measurements.

Original languageEnglish (US)
Pages (from-to)1312-1314
Number of pages3
JournalMicroelectronic Engineering
Volume87
Issue number5-8
DOIs
StatePublished - May 1 2010

Keywords

  • AFM
  • Adiabatic compression
  • Photonic crystal
  • Plasmon
  • Raman
  • SERS
  • Single molecule detection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Adiabatic compression of surface plasmon polaritons for label-free few molecules detection by means of Raman scattering'. Together they form a unique fingerprint.

Cite this