title: Far-field optical imaging of a linear array of coupled gold nanocubes: direct visualization of dark plasmon propagating modes.
abstract: Plasmonic nanoantenna arrays hold great promise for diffraction-unlimited light localization, confinement, and transport. Here, we report on linear plasmonic nanoantenna arrays composed of colloidal gold nanocubes precisely assembled using a nanomanipulation technique. In particular, we show the direct evidence of dark propagating modes in the plasmon coupling regime, allowing for transport of guided plasmon waves without far-field radiation losses. Additionally, we demonstrate the possibility of plasmon dispersion engineering in coupled gold nanocube chains. By assembling a nanocube chain with two sections of coupled nanocubes of different intercube separations, we are able to produce the effect of a band-pass nanofilter.
authors: Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan.
authors: Hung-Ying
authors: HY
authors: Chen
authors: Chieh-Lun
authors: CL
authors: He
authors: Chun-Yuan
authors: CY
authors: Wang
authors: Meng-Hsien
authors: MH
authors: Lin
authors: Daisuke
authors: D
authors: Mitsui
authors: Miharu
authors: M
authors: Eguchi
authors: Toshiharu
authors: T
authors: Teranishi
authors: Shangjr
authors: S
authors: Gwo