Fully analytical description of adiabatic compression in dissipative polaritonic structures

Remo Proietti Zaccaria*, Alessandro Alabastri, Francesco De Angelis, Gobind Das, Carlo Liberale, Andrea Toma, Andrea Giugni, Luca Razzari, Mario Malerba, Hong Bo Sun, Enzo Di Fabrizio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

We have theoretically modeled and experimentally fabricated a nanoscale adiabatic (conical) metallic structure that is suitable for high-resolution Raman spectroscopy. We report on a fully complex analytical description of the adiabatic compression phenomenon which is investigated in terms of both geometrical and optical parameters. An explicit analytical description of adiabatic compression is provided together with the physical role played by the complex effective refractive index of the polaritonic adiabatic mode. In particular, we have examined the role of absorption on the field enhancement. Finally, we demonstrate how such a device can experimentally enhance the Raman signal coming from nanosamples such as a bead of SiO x and a monolayer of benzenethiol.

Original languageEnglish (US)
Article number035410
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number3
DOIs
StatePublished - Jul 5 2012

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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