Method for enhanced infrared spectroscopy of molecules with nanorod arrays

Clément Tardieu, Grégory Vincent, Nathalie Bardou, Riad Haïdar, Stéphane Collin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Recent studies led in the field of infrared spectroscopy focused on the use of nanoantennas to enhance electromagnetic field on the bonds of molecules, in order to improve detection. We propose to take benefit from dipolar optical resonances in dielectric free-standing nanorod arrays as an innovative component to achieve spectroscopy in the mid-infrared wavelength range. The particularity of this component is not only to allow electromagnetic ield enhancement, but also its ability to shift spectrally the resonance according to incidence angle. Spectroscopy is thus possible on a wide wavelength range for a given geometry of the nanorods. We present here numerical studies of the impact of the size of nanorods on the reiection spectra. We use the permittivity of a test molecule determined by transmission spectra. In addition, we introduce the fabrication process, transmission and reflection measurements of nanorods.

Original languageEnglish
Title of host publicationOptical Sensing and Detection IV
EditorsFrancis Berghmans, Anna G. Mignani
PublisherSPIE
ISBN (Electronic)9781510601444
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes
EventOptical Sensing and Detection IV - Brussels, Belgium
Duration: 3 Apr 20167 Apr 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9899
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOptical Sensing and Detection IV
Country/TerritoryBelgium
CityBrussels
Period3/04/167/04/16

Keywords

  • Nanorods
  • mid-infrared
  • spectroscopy
  • subwavelength structures

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