title: Generation of pronounced Fano resonances and tuning of subwavelength spatial light distribution in plasmonic pentamers.
abstract: Arrays of plasmonic pentamers consisting of five metallic nano-disks were designed and fabricated to achieve a pronounced Fano Resonance with polarization-independent far-field spectral response at normal incidence due to the structure symmetry of pentamers. A mass-spring coupled oscillator model was applied to study plasmon interactions among the nano-disks. It was found that the direction of the excitation light polarization can flexibly tune the spatial localization of near-field energy at sub-wavelength scales while the collective optical properties are kept constant. It can lead to a selective storage of excited energy down to sub-20 nm gap at a normal incident with a single light source.
authors: Data Storage Institute, (A*STAR) Agency for Science Technology and Research, 5 Engineering Drive 1, 117608 Singapore.
authors: M
authors: M
authors: Rahmani
authors: B
authors: B
authors: Lukiyanchuk
authors: B
authors: B
authors: Ng
authors: A
authors: A
authors: Tavakkoli K G
authors: Y F
authors: YF
authors: Liew
authors: M H
authors: MH
authors: Hong