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Wafer scale fabrication of porous three-dimensional plasmonic metamaterials for the visible region: chiral and beyond

Singh, Johnson Haobijam and Nair, Greshma and Ghosh, Arijit and Ghosh, Ambarish (2013) Wafer scale fabrication of porous three-dimensional plasmonic metamaterials for the visible region: chiral and beyond. In: NANOSCALE, 5 (16). pp. 7224-7228.

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Official URL: http://dx.doi.org/10.1039/c3nr02666c

Abstract

We report on a wafer scale fabrication method of a three-dimensional plasmonic metamaterial with strong chiroptical response in the visible region of the electromagnetic spectrum. The system was comprised of metallic nanoparticles arranged in a helical fashion, with high degree of flexibility over the choice of the underlying material, as well as their geometrical parameters. This resulted in exquisite control over the chiroptical properties, most importantly the spectral signature of the circular dichroism. In spite of the large variability in the arrangement, as well as the size and shape of the constituent nanoparticles, the average chiro-optical response of the material remained uniform across the wafer, thus confirming the suitability of this system as a large area chiral metamaterial. By simply heating the substrate for a few minutes, the geometrical properties of the nanoparticles could be altered, thus providing an additional handle towards tailoring the spectral response of this novel material.

Item Type: Journal Article
Additional Information: Copyright of this article is belongs to ROYAL SOC CHEMISTRY
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
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Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 27 Sep 2013 08:02
Last Modified: 30 Sep 2013 06:56
URI: http://eprints.iisc.ac.in/id/eprint/47332

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