title: Nanoscale Color Sorting of Surface Plasmons in a Double-Nanogap Structure with Multipolar Plasmon Excitation.
abstract: We demonstrated a new plasmonic nanodevice that spatially sorts photons according to their colors on the nanoscale while maintaining their nanoconcentration. The properties of this nanoscale color sorting based on constructive and destructive interferences between different multipolar plasmon modes are controlled by tuning the incidence angle of the incoming photons. The added ability of color sorting and its manipulation could significantly influence the development of possible photonic applications, including nanoscale spectroscopy and sensing.
authors.affiliation: Research Institute for Electronic Science, Hokkaido University , Sapporo 001-0020, Japan.
authors.forename: Yoshito Y
authors.initials: YY
authors.lastname: Tanaka
authors.affiliation: Research Institute for Electronic Science, Hokkaido University , Sapporo 001-0020, Japan.
authors.forename: Masaya
authors.initials: M
authors.lastname: Komatsu
authors.affiliation: Research Institute for Electronic Science, Hokkaido University , Sapporo 001-0020, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Fujiwara
authors.affiliation: Research Institute for Electronic Science, Hokkaido University , Sapporo 001-0020, Japan.
authors.forename: Keiji
authors.initials: K
authors.lastname: Sasaki
keywords: Nanogap; color sorting; localized surface plasmon; multipolar plasmon excitation; plasmonic interference