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A bottom-up approach to fabricate optical metamaterials by self-assembled metallic nanoparticles

Dintinger, J.; Mühlig, S.; Rockstuhl, C.; Scharf, T.

We introduce a novel bottom-up approach to fabricate by self assembly a metamaterial from metallic nanoparticles in a two-step process. In the first step, a metamaterial made of densely packed silver nanoparticles is required. The material dispersion with increasing nanoparticle densities, from dispersed to randomly packed nanoparticles, was measured by spectroscopic ellipsometry, demonstrating high permittivity values in the visible. In the second step, this material was used to prepare spherical clusters by a method based on oil-in-water emulsion. The optical properties of these clusters were equally investigated by spectroscopic means. Comparisons with rigorous numerical simulations clearly indicate that, depending on the cluster size, their spectral response can be unambiguously associated with the excitation of a magnetic dipole resonance. As a consequence, such spherical clusters are promising building blocks for future metamaterials possessing a magnetic response in the visible range.

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Verlagsausgabe §
DOI: 10.5445/IR/1000040587
Veröffentlicht am 27.04.2018
DOI: 10.1364/OME.2.000269
Zitationen: 37
Web of Science
Zitationen: 38
Seitenaufrufe: 25
seit 27.04.2018
Downloads: 22
seit 17.05.2018
Zugehörige Institution(en) am KIT Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2012
Sprache Englisch
Identifikator ISSN: 2159-3930
KITopen-ID: 1000040587
Erschienen in Optical materials express
Band 2
Heft 3
Seiten 269-278
Nachgewiesen in Web of Science
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