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

Journal Article · Mon Feb 17 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4865553· OSTI ID:22283132

Aristov, Andrey I.; Zywietz, Urs; Evlyukhin, Andrey B.; Reinhardt, Carsten; Chichkov, Boris N. ^[1]

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1. Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover (Germany)

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.

• OSTI ID: 22283132
• Journal Information: Applied Physics Letters, Vol. 104, Issue 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
COUPLING
GOLD
LASER RADIATION
NANOSTRUCTURES
PHASE SHIFT
PLASMONS
REFRACTIVE INDEX
SENSITIVITY
SENSORS
VISIBLE RADIATION