High-Resolution Imaging and Spectroscopy of Multipolar Plasmonic Resonances in Aluminum Nanoantennas Martin, Jérôme ; Kociak, Mathieu ; Mahfoud, Zackaria ; Proust, Julien ; Gérard, Davy ; Plain, Jérôme Abstract Publication: Nano Letters Pub Date: October 2014 DOI: 10.1021/nl501850m Bibcode: 2014NanoL..14.5517M