Terahertz Dipole Nanoantenna Arrays: Resonance Characteristics

Luca Razzari*, Andrea Toma, Matteo Clerici, Mostafa Shalaby, Gobind Das, Carlo Liberale, Manohar Chirumamilla, Remo Proietti Zaccaria, Francesco De Angelis, Marco Peccianti, Roberto Morandotti, Enzo Di Fabrizio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Resonant dipole nanoantennas promise to considerably improve the capabilities of terahertz spectroscopy, offering the possibility of increasing its sensitivity through local field enhancement, while in principle allowing unprecedented spatial resolutions, well below the diffraction limit. Here, we investigate the resonance properties of ordered arrays of terahertz dipole nanoantennas, both experimentally and through numerical simulations. We demonstrate the tunability of this type of structures, in a range (~1-2 THz) that is particularly interesting and accessible by means of standard zinc telluride sources. We additionally study the near-field resonance properties of the arrays, finding that the resonance shift observed between near-field and far-field spectra is predominantly ascribable to ohmic damping.

Original languageEnglish (US)
Pages (from-to)133-138
Number of pages6
JournalPlasmonics
Volume8
Issue number1
DOIs
StatePublished - Jan 1 2013

Keywords

  • Nanophotonics
  • Nanostructure fabrication
  • Plasmonics
  • Terahertz spectroscopy

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biochemistry

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