Epstein Ariel, Eleftheriades George V
The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario M5S 2E4, Canada.
Phys Rev Lett. 2016 Dec 16;117(25):256103. doi: 10.1103/PhysRevLett.117.256103.
We introduce a paradigm for accurate design of metasurfaces for intricate beam manipulation, implementing functionalities previously considered impossible to achieve with passive lossless elements. The key concept involves self-generation of auxiliary evanescent fields which facilitate the required local power conservation, without interfering with the device performance in the far field. We demonstrate our scheme by presenting exact reactive solutions to the challenging problems of reflectionless beam splitting and perfect reflection, verified via full wave simulations.
我们引入了一种用于精确设计超表面以实现复杂光束操控的范例，实现了以前认为无源无损元件无法实现的功能。关键概念涉及辅助倏逝场的自生成，这有助于实现所需的局部功率守恒，同时不会干扰远场中的器件性能。我们通过给出针对无反射光束分裂和完美反射这两个具有挑战性问题的精确电抗解来展示我们的方案，并通过全波模拟进行了验证。
