Title :
Fano resonances of organic films on asymmetric split-ring resonators (A-SRRs)
Author :
Johnson, N.P. ; Lahiri, B. ; Sharp, Graham J. ; De La Rue, Richard M. ; McMeekin, Scott G.
Author_Institution :
Sch. of Eng., Univ. of Glasgow, Glasgow, UK
Abstract :
Thin organic films deposited on the surface of arrays of asymmetric split-ring resonators (A-SRRs) produces a shift in their resonance spectra that can be utilised for sensitive analyte detection. When poly-methyl-methacrylate (PMMA) a well known electron beam lithography resist, is used as an organic probe, the phase and amplitude of a characteristic molecular Fano resonance associated with a carbonyl bond changes with its position relative to spectra peaks of the A-SRRs. The localization of blocks of PMMA at different positions on the A-SRR array also shows their relative sensitivity to position and corresponding hot spots as determined by simulation. Other organic materials such as progesterone show similar Fano resonances.
Keywords :
electron beam lithography; infrared detectors; optical arrays; optical films; optical polymers; optical resonators; resists; A-SRR array; A-SRR spectra peaks; PMMA block localization; asymmetric split-ring resonator arrays; carbonyl bond; characteristic molecular Fano resonance amplitude; characteristic molecular Fano resonance phase; electron beam lithography resist; hot spots; organic materials; organic probe; poly-methyl-methacrylate; progesterone; relative sensitivity; resonance spectra; sensitive analyte detection; thin organic films; Films; Metamaterials; Optical resonators; Reflection; Reflectivity; Sensitivity; Silicon compounds;
Conference_Titel :
Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2013 7th International Congress on
Conference_Location :
Talence
Print_ISBN :
978-1-4799-1229-2
DOI :
10.1109/MetaMaterials.2013.6809007
