Negative-Index Metamaterials: Looking into the Unit Cell

Year: 2010

Authors: Burresi M., Diessel D., van Oosten D., Linden S., Wegener M., Kuipers L.

Autors Affiliation: Center for Nanophotonics, FOM Institute for Atomic and Molecular Physics (AMOLF), Science Park 104,1098 XG Amsterdam, The Netherlands; European Laboratory for Nonlinear Spectroscopy (LENS) and CNR-INO, Via N. Carrara 1., 50019 Sesto Fiorentino, Firenze, Italy; Institut fur Nanotechnologie, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz -Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany and Institut fur Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, D-76131 Karlsruhe, Germany

Abstract: With their potential for spectacular applications, like superlensing and cloaking, metamaterials are a powerful class of nanostructured materials All these applications rely on the metamaterials acting as a homogeneous material We investigate a negative index metamaterial with a phase-sensitive near-field microscope and measure the optical phase as a function of distance Close to the metamaterial we observe extremely large spatial phase variations within a single unit cell which vanish on a 200 nm length scale from the sample These deviations of a state-of-the-art metamaterial from a homogeneous medium can be important for nanoscale applications

Journal/Review: NANO LETTERS

Volume: 10 (7)      Pages from: 2480  to: 2483

More Information: We thank Gunnar Dolling for the fabrication of the sample and for his contributions in the early phase of this work We thank Hinco Schoenmaker for technical support and the realization of the hybrid probe (Supporting Information) This work is part of the research program of the Stichting voor Fundamenteel Onderzoek der Materie (FOM), which is financially supported by the Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO) Support by the NWO (VICI grant) is gratefully acknowledged This work is also supported by NanoNed, a nanotechnology program of the Dutch Ministry of Economic affairs We acknowledge support by the Deutsche Forschungsgemeinschaft (DFG) and the State of Baden-Wurttemberg through the DFG-Center for Funct ional Nanostructures (CFN) within subproject A 1 5 The project PHOME acknowledges the financial support of the Future and Emerging Technologies (FET) programme within the Seventh Framework Programme for Research of the European Commission, under FET-Open Grant 213390 The project METAMAT is supported by the Bundesministerium fur Bildung und Forschung (BMBF) The research of S L is further supported through a Helmholtz-Hochschul-Nachwuchsgruppe (VH-NG-232) The Ph D education of D D is embedded in the Karlsruhe School of Optics & Photonics (KSOP)
KeyWords: Near-field optics; nanophotonics; metamaterials; negative refractive index
DOI: 10.1021/nl100943e

Citations: 25
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