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Proceedings Paper

Engineered/tailored nanoporous gold structures for infrared plasmonics
Author(s): Denis Garoli; Eugenio Calandrini; Sandro Cattarin; Simona Barison; Pierfrancesco Zilio; Angelo Bozzola; Andrea Toma; Francesco De Angelis
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Paper Abstract

Nanoporous gold is a very promising and novel material platform for mid-infrared and THz plasmonics. Nanoporous gold can be formed by dealloying of Au–Ag alloys, previously grown by means of Ag-Au co-sputtering. The optical response is completely determined by the nanostructural film features, that depends on the initial alloy composition and on the preparation procedure. The behavior of the material in mid-infrared and its peculiar morphology with a very high surface/volume ratio can be applied for nanostructure fabrication, such for example nanoantennas. Here we report the design and fabrication of nanoporous antennas engineered to support resonances in the 1500-1700 cm-1 range where them can be exploited, for example, in the detection of protein conformational states. This novel paradigm points toward the development of a new class of efficient and high-selective biosensors.

Paper Details

Date Published: 28 August 2015
PDF: 6 pages
Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 95470K (28 August 2015); doi: 10.1117/12.2186562
Show Author Affiliations
Denis Garoli, Istituto Italiano di Tecnologia (Italy)
Eugenio Calandrini, Istituto Italiano di Tecnologia (Italy)
Sandro Cattarin, CNR-IENI (Italy)
Simona Barison, CNR-IENI (Italy)
Pierfrancesco Zilio, Istituto Italiano di Tecnologia (Italy)
Angelo Bozzola, Istituto Italiano di Tecnologia (Italy)
Andrea Toma, Istituto Italiano di Tecnologia (Italy)
Francesco De Angelis, Istituto Italiano di Tecnologia (Italy)

Published in SPIE Proceedings Vol. 9547:
Plasmonics: Metallic Nanostructures and Their Optical Properties XIII
Allan D. Boardman; Din Ping Tsai, Editor(s)

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