Plasmonic Nickel Nanoantennas (pages 2341–2347)
Jianing Chen, Pablo Albella, Zhaleh Pirzadeh, Pablo Alonso-González, Florian Huth, Stefano Bonetti, Valentina Bonanni, Johan Åkerman, Josep Nogués, Paolo Vavassori, Alexandre Dmitriev, Javier Aizpurua and Rainer Hillenbrand
Article first published online: 16 JUN 2011 | DOI: 10.1002/smll.201100640
Experimental evidence of plasmon resonances in pure nickel nanoantennas is provided by both far-field spectroscopy and near-field microscopy. Ultra-high resolution near-field microscopy visualizes the dipole plasmon modes in nickel disks as well as the transverse plasmon mode of elongated nickel nanoantennas. The shifts between far- and near-field spectra of plasmonic antennas are also elucidated, which points out the need of taking into account both near- and far-field properties when designing nanophotonic devices.