title: Two-dimensional light confinement in cross-index-modulation plasmonic waveguides.
abstract: We report a numerical study of plasmonic waveguides that localize light in two dimensions at a cross section of 4.2 nm × 2.1 nm with the propagation length of 38 μm. By varying the geometrical parameters, strong mode confinements (range from λ(2)/3352 to λ(2)/2557525) are achieved with controllable propagation distance (44.68-40.988 μm), and mode size below 1 nm(2) has been demonstrated for the first time. Furthermore, a cross-index-modulation mechanism is proposed to explain the strong field localization behavior, providing guidelines for future waveguide designs.
authors: Department of Information Science & Electronic Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China. rhao@zju.edu.cn
authors: Ran
authors: R
authors: Hao
authors: Erping
authors: E
authors: Li
authors: Xingchang
authors: X
authors: Wei