title: Rainbow trapping in hyperbolic metamaterial waveguide.
abstract: The recent reported trapped "rainbow" storage of light using metamaterials and plasmonic graded surface gratings has generated considerable interest for on-chip slow light. The potential for controlling the velocity of broadband light in guided photonic structures opens up tremendous opportunities to manipulate light for optical modulation, switching, communication and light-matter interactions. However, previously reported designs for rainbow trapping are generally constrained by inherent difficulties resulting in the limited experimental realization of this intriguing effect. Here we propose a hyperbolic metamaterial structure to realize a highly efficient rainbow trapping effect, which, importantly, is not limited by those severe theoretical constraints required in previously reported insulator-negative-index-insulator, insulator-metal-insulator and metal-insulator-metal waveguide tapers, and therefore representing a significant promise to realize the rainbow trapping structure practically.
authors: Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260, USA.
authors: Haifeng
authors: H
authors: Hu
authors: Dengxin
authors: D
authors: Ji
authors: Xie
authors: X
authors: Zeng
authors: Kai
authors: K
authors: Liu
authors: Qiaoqiang
authors: Q
authors: Gan