Rainbow trapping in hyperbolic metamaterial waveguide

Haifeng Hu, Dengxin Ji, Xie Zeng, Kai Liu, Qiaoqiang Gan

Research output: Contribution to journalArticlepeer-review

167 Scopus citations


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.
Original languageEnglish (US)
JournalScientific Reports
StatePublished - Mar 1 2013
Externally publishedYes

ASJC Scopus subject areas

  • General


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