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Plasmonic Nickel Nanoantennas
Author(s) -
Chen Jianing,
Albella Pablo,
Pirzadeh Zhaleh,
AlonsoGonzález Pablo,
Huth Florian,
Bonetti Stefano,
Bonanni Valentina,
Åkerman Johan,
Nogués Josep,
Vavassori Paolo,
Dmitriev Alexandre,
Aizpurua Javier,
Hillenbrand Rainer
Publication year - 2011
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201100640
Subject(s) - plasmon , field (mathematics) , dipole , spectroscopy , nickel , materials science , localized surface plasmon , surface plasmon resonance , near and far field , molecular physics , discrete dipole approximation , surface plasmon , physics , condensed matter physics , optics , optoelectronics , nanoparticle , nanotechnology , quantum mechanics , mathematics , pure mathematics , metallurgy
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‐field 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.