title: Controlling the interplay of electric and magnetic modes via Fano-like plasmon resonances.
abstract: Assemblies of strongly coupled plasmonic nanoparticles can support highly tunable electric and magnetic resonances in the visible spectrum. In this Letter, we theoretically demonstrate Fano-like interference effects between the fields radiated by the electric and magnetic modes of symmetric nanoparticle trimers. Breaking the symmetry of the trimer system leads to a strong interaction between the modes. The near and far-field electromagnetic properties of the broken symmetry trimer are tunable across a large spectral range. We exploit this Fano-like effect to demonstrate spatial and temporal control of the localized electromagnetic hotspots in the plasmonic trimer.
authors.affiliation: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States.
authors.forename: Sassan N
authors.initials: SN
authors.lastname: Sheikholeslami
authors.forename: Aitzol
authors.initials: A
authors.lastname: García-Etxarri
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Dionne
mesh_terms: D015374:Biosensing Techniques; D004574:Electromagnetic Fields; D060733:Electromagnetic Radiation; D008280:Magnetics; D015233:Models, Statistical; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D055095:Optics and Photonics; D020349:Surface Plasmon Resonance