title: Inhibition of multipolar plasmon excitation in periodic chains of gold nanoblocks.
abstract: Periodically corrugated chains of gold nanoblocks, fabricated with high precision by electron-beam lithography and lift-off techniques, were found to exhibit optical signatures of particle plasmon states in which relative contribution of longitudinal multipolar plasmons is significantly lower than that in equivalent rectangular gold nanorods. Plasmonic response of periodic chains is dominated by dipolar plasmon modes, which in the absence of multipolar exciations are seen as background-free and spectrally well-resolved extinction peaks at infrared (IR) wavelengths. This observation may help improve spectral parameters of IR plasmonic sub-wavelength antennae. Comparative studies of plasmon damping and dephasing in corrugated chains of nanoblocks and smooth rectangular nanorods are also presented.
authors: Kosei
authors: K
authors: Ueno
authors: Saulius
authors: S
authors: Juodkazis
authors: Vygantas
authors: V
authors: Mizeikis
authors: Dai
authors: D
authors: Ohnishi
authors: Keiji
authors: K
authors: Sasaki
authors: Hiroaki
authors: H
authors: Misawa