title: Substrate-mediated charge transfer plasmons in simple and complex nanoparticle clusters.
abstract: A conductive substrate can provide a simple and straightforward way to induce charge-transfer plasmon modes in Au nanoparticle clusters. For a simple dimer structure, a remarkably narrow charge transfer plasmon, which differs dramatically from the dipolar plasmon mode of the electrically isolated nanostructure, is clearly observed. For a more complex nonamer cluster that supports a strong Fano resonance on an insulating substrate, a mixed charge transfer-dipole mode is observed, where charge transfer is induced on the outer nanoparticles, establishing an opposing dipole on the intervening central particles, resulting in a strongly damped far field response.
authors: Department of Electrical and Computer Engineering, Department of Physics and Astronomy, Laboratory for Nanophotonics, Rice Quantum Institute, Rice University, 6100 Main Street, Houston, Texas 77005, USA.
authors: Yumin
authors: Y
authors: Wang
authors: Ziwei
authors: Z
authors: Li
authors: Ke
authors: K
authors: Zhao
authors: Ali
authors: A
authors: Sobhani
authors: Xing
authors: X
authors: Zhu
authors: Zheyu
authors: Z
authors: Fang
authors: Naomi J
authors: NJ
authors: Halas