title: Laterally tunable plasmon resonance in confined biatomic-layer ag nanodisks.
abstract: We report on the fabrication and investigation of the plasmon excitations in laterally confined quasi-two-dimensional (2D) Ag nanodisks on a Si(111) substrate. Different from the Mie resonance in Ag clusters and the propagating plasmon waves in 2D systems, these ultrathin nanodisks exhibit a low-energy plasmon resonance whose frequency is continuously tunable by the disk diameter. Quantum-mechanical simulations revealed the origin and the effects of screening and charge transfer on the plasmon excitation. The character and size-dependence are promising for engineering plasmonic and optical properties in supported 2D systems.
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Huajun
authors.initials: H
authors.lastname: Qin
authors.forename: Yi
authors.initials: Y
authors.lastname: Gao
authors.forename: Jing
authors.initials: J
authors.lastname: Teng
authors.forename: Hongxing
authors.initials: H
authors.lastname: Xu
authors.forename: Kehui
authors.initials: K
authors.lastname: Wu
authors.forename: Shiwu
authors.initials: S
authors.lastname: Gao