title: Enhanced Fano resonance of organic material films deposited on arrays of asymmetric split-ring resonators (A-SRRs).
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. Furthermore, we localize blocks of PMMA at different locations on the A-SRR array to determine the effectiveness of detection of very small amounts of non-uniformly distributed analyte.
authors.affiliation: School of Engineering, University of Glasgow, Glasgow G12 8LT, UK.
authors.forename: Basudev
authors.initials: B
authors.lastname: Lahiri
authors.forename: Scott G
authors.initials: SG
authors.lastname: McMeekin
authors.forename: Richard M
authors.initials: RM
authors.lastname: De la Rue
authors.forename: Nigel P
authors.initials: NP
authors.lastname: Johnson
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D008670:Metals / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: D008670:Metals; D019904:Polymethyl Methacrylate