Enhanced Fano resonance of organic material films deposited on arrays of asymmetric split-ring resonators (A-SRRs)

Basudev Lahiri, Scott G. McMeekin, Richard M. De La Rue, Nigel P. Johnson

Research output: Contribution to journalArticle

Abstract

Depositing very thin organic films on the surface of arrays of asymmetric split-ring resonators (A-SRRs) produces a shift in their resonance spectra that can be utilized for sensitive analyte detection. Here we show that when poly-methyl-methacrylate (PMMA) is used as an organic probe (analyte) on top of the A-SRR array, the phase and amplitude of a characteristic molecular Fano resonance associated with a carbonyl bond changes according to the spectral positions of the trapped mode resonance of the A-SRRs and their plasmonic reflection peaks.
Original languageEnglish
Pages (from-to)9343-9352
Number of pages10
JournalOptics Express
Volume21
Issue number8
DOIs
Publication statusPublished - Apr 2013

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Keywords

  • spectroscopy
  • asymmetric split-ring resonators
  • optical sensors

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