title: Plasmonic enhancements of photoluminescence in hybrid Si nanostructures with Au fabricated by fully top-down lithography.
abstract: The authors study plasmonic enhancements of photoluminescence (PL) in Si nanodisk (ND) arrays hybridized with nanostructures such as nanoplates of Au, where these hybrid nanostructures are fabricated by fully top-down lithography: neutral-beam etching using bio-nano-templates and high-resolution electron-beam lithography. The separation distance between the Si ND and Au nanostructure surfaces is precisely controlled by inserting a thin SiO2 layer with a thickness of 3 nm. We observe that PL intensities in the Si NDs are enhanced by factors up to 5 depending on the wavelength by integrating with the Au nanoplates. These enhancements also depend on the size and shape of the Au nanoplates.
authors.affiliation: Graduate School of Information Science and Technology, Hokkaido University, Kita 14, Nishi 9, Kita-ku, Sapporo, 060-0814, Japan. murayama@ist.hokudai.ac.jp.
authors.forename: Koudo
authors.initials: K
authors.lastname: Nakaji
authors.forename: Hao
authors.initials: H
authors.lastname: Li
authors.forename: Takayuki
authors.initials: T
authors.lastname: Kiba
authors.forename: Makoto
authors.initials: M
authors.lastname: Igarashi
authors.forename: Seiji
authors.initials: S
authors.lastname: Samukawa
authors.forename: Akihiro
authors.initials: A
authors.lastname: Murayama