title: Nanoscale Spatial Coherent Control over the Modal Excitation of a Coupled Plasmonic Resonator System.
abstract: We demonstrate coherent control over the optical response of a coupled plasmonic resonator by high-energy electron beam excitation. We spatially control the position of an electron beam on a gold dolmen and record the cathodoluminescence and electron energy loss spectra. By selective coherent excitation of the dolmen elements in the near field, we are able to manipulate modal amplitudes of bonding and antibonding eigenmodes. We employ a combination of CL and EELS to gain detailed insight in the power dissipation of these modes at the nanoscale as CL selectively probes the radiative response and EELS probes the combined effect of Ohmic dissipation and radiation.
authors.affiliation: Center for Nanophotonics, FOM Institute AMOLF , Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors.forename: Toon
authors.initials: T
authors.lastname: Coenen
authors.affiliation: Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States.
authors.forename: David T
authors.initials: DT
authors.lastname: Schoen
authors.affiliation: Center for Nanophotonics, FOM Institute AMOLF , Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors.forename: Sander A
authors.initials: SA
authors.lastname: Mann
authors.affiliation: Center for Nanophotonics, FOM Institute AMOLF , Science Park 104, 1098 XG Amsterdam, The Netherlands.|Philips Research Laboratories , High Tech Campus 4, 5656 AE Eindhoven, The Netherlands.
authors.forename: Said R K
authors.initials: SR
authors.lastname: Rodriguez
authors.affiliation: Center for Nanophotonics, FOM Institute AMOLF , Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors.forename: Benjamin J M
authors.initials: BJ
authors.lastname: Brenny
authors.affiliation: Center for Nanophotonics, FOM Institute AMOLF , Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors.forename: Albert
authors.initials: A
authors.lastname: Polman
authors.affiliation: Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States.
authors.forename: Mark L
authors.initials: ML
authors.lastname: Brongersma
keywords: Plasmonics; cathodoluminescence spectroscopy; coherent control; electron energy loss spectroscopy; metamolecules; near-field coupling