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Title: Laser-ablative engineering of phase singularities in plasmonic metamaterial arrays for biosensing applications

By using methods of laser-induced transfer combined with nanoparticle lithography, we design and fabricate large-area gold nanoparticle-based metamaterial arrays exhibiting extreme Heaviside-like phase jumps in reflected light due to a strong diffractive coupling of localized plasmons. When employed in sensing schemes, these phase singularities provide the sensitivity of 5 × 10{sup 4} deg. of phase shift per refractive index unit change that is comparable with best values reported for plasmonic biosensors. The implementation of sensor platforms on the basis of such metamaterial arrays promises a drastic improvement of sensitivity and cost efficiency of plasmonic biosensing devices.
Authors:
;  [1] ; ; ; ;  [2]
  1. Aix Marseille University, CNRS, LP3 UMR 7341, Campus de Luminy - Case 917, 13288, Marseille Cedex 9 (France)
  2. Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover (Germany)
Publication Date:
OSTI Identifier:
22283132
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; COUPLING; GOLD; LASER RADIATION; NANOSTRUCTURES; PHASE SHIFT; PLASMONS; REFRACTIVE INDEX; SENSITIVITY; SENSORS; VISIBLE RADIATION