Plasmonic nanoparticles for a bottom-up approach to fabricate optical metamaterials

José Dintinger; Toralf Scharf

doi:10.1117/12.906983

22 February 2012 Plasmonic nanoparticles for a bottom-up approach to fabricate optical metamaterials

José Dintinger, Toralf Scharf

Proceedings Volume 8269, Photonic and Phononic Properties of Engineered Nanostructures II; 82691C (2012) https://doi.org/10.1117/12.906983
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

We investigate experimentally metallic nanoparticle composites fabricated by bottom-up techniques as potential candidates for optical metamaterials. Depending on the plasmonic resonances sustained by individual NPs and their nanoscale organization into larger meta-atoms, various properties might emerge. Here, the focus of our contribution is on the fabrication and optical characterization of silver NP clusters with a spherical shape. We start with the characterisation of the "bulk" dielectric constants of silver NP inks by spectroscopic ellipsometry for different nanoparticle densities (i.e from strongly diluted dispersions to solid randomly packed films). The inks are then used to prepare spherical nanoparticle clusters by an oil-in water emulsion technique. The study of their optical properties demonstrates their ability to support Mie resonances in the visible. These resonances are associated with the excitation of a magnetic dipole, which constitutes a prerequisite to the realization of metamaterials with negative permeability.

Citation Download Citation

José Dintinger and Toralf Scharf "Plasmonic nanoparticles for a bottom-up approach to fabricate optical metamaterials", Proc. SPIE 8269, Photonic and Phononic Properties of Engineered Nanostructures II, 82691C (22 February 2012); https://doi.org/10.1117/12.906983

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KEYWORDS

Nanoparticles

Magnetism

Silver

Metamaterials

Spherical lenses

Composites

Dielectrics

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