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Proceedings Paper

Phase singularities in 3D plasmonic crystal metamaterials for ultra-sensitive biosensing
Author(s): Artem Danilov; Andrey I. Aristov; Maria Manousidaki; Konstantina Terzaki; Costas Fotakis; Maria Farsari; Andrei V. Kabashin
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Paper Abstract

Plasmonic biosensors form the core label-free technology for studies of biomolecular interactions, but they still need a drastic improvement of sensitivity and novel nano-architectural implementations to match modern trends of nanobiotechnology. Here, we consider the generation of resonances in light reflected from 3D woodpile plasmonic crystal metamaterials fabricated by Direct Laser Writing by Multi-Photon Polymerization, followed by silver electroless plating. We show that the generation of these resonances is accompanied by the appearance of singularities of phase of reflected light and examine the response of phase characteristics to refractive index variations inside the metamaterial matrix. The recorded phase sensitivity (3*104 deg. of phase shift per RIU change) outperforms most plasmonic counterparts and is attributed to particular conditions of plasmon excitation in 3D plasmonic crystal geometry. Combined with a large surface for biomolecular immobilizations offered by the 3D woodpile matrix, the proposed sensor architecture promises a new important landmark in the advancement of plasmonic biosensing technology.

Paper Details

Date Published: 20 February 2017
PDF: 7 pages
Proc. SPIE 10093, Synthesis and Photonics of Nanoscale Materials XIV, 100930G (20 February 2017); doi: 10.1117/12.2253024
Show Author Affiliations
Artem Danilov, Aix-Marseille Univ., CNRS, LPS (France)
Andrey I. Aristov, Aix-Marseille Univ., CNRS, LPS (France)
Maria Manousidaki, ISEL-FORTH (Greece)
Univ. of Crete (Greece)
Konstantina Terzaki, IELS-FORTH (Greece)
Costas Fotakis, IELS-FORTH (Greece)
Univ. of Crete (Greece)
Maria Farsari, ISEL-FORTH (Greece)
Andrei V. Kabashin, Aix-Marseille Univ., CNRS, LPS (France)


Published in SPIE Proceedings Vol. 10093:
Synthesis and Photonics of Nanoscale Materials XIV
David B. Geohegan; Jan J. Dubowski; Andrei V. Kabashin, Editor(s)

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