Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260, USA.
Sci Rep. 2013;3:1249. doi: 10.1038/srep01249. Epub 2013 Feb 13.
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.
最近报道的使用超材料和等离子体渐变表面光栅实现的被困“彩虹”光存储，为片上慢光引起了相当大的兴趣。控制导波光在导波光子结构中的速度的潜力为光学调制、开关、通信和光物质相互作用开辟了巨大的机会来控制光。然而，以前报道的彩虹捕获设计通常受到固有困难的限制，导致这种有趣效应的实验实现受到限制。在这里，我们提出了一种双曲超材料结构来实现高效的彩虹捕获效应，重要的是，它不受以前报道的绝缘体负折射率-绝缘体、绝缘体-金属-绝缘体和金属-绝缘体-金属波导渐变锥所需要的那些严格理论限制的限制，因此在实际实现彩虹捕获结构方面具有很大的潜力。
