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Plasmonic Nickel Nanoantennas

Journal article
Authors Jianing Chen
Pablo Albella
Zhaleh Pirzadeh
Pablo Alonso-Gonzalez
Florian Huth
Stefano Bonetti
Valentina Bonanni
Johan Åkerman
Josep Nogues
Paolo Vavassori
Alexandre Dmitriev
Javier Aizpurua
Rainer Hillenbrand
Published in Small
Volume 7
Issue 16
Pages 2341–2347
ISSN 1613-6829
Publication year 2011
Published at Department of Physics (GU)
Pages 2341–2347
Language en
Subject categories Optics, Optical physics, Functional materials, Engineering physics


The fundamental optical properties of pure nickel nanostructures are studied by far-field extinction spectroscopy and optical near-field microscopy, providing direct experimental evidence of the existence of particle plasmon resonances predicted by theory. Experimental and calculated near-field maps allow for unambiguous identification of dipolar plasmon modes. By comparing calculated near-field and far-fi eld spectra, dramatic shifts are found between the near-field and far-field plasmon resonances, which are much stronger than in gold nanoantennas. Based on a simple damped harmonic oscillator model to describe plasmonic resonances, it is possible to explain these shifts as due to plasmon damping.

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