Next Generation Engineered Electromagnetic Surfaces and Materials

下一代工程电磁表面和材料

• 批准号: RGPIN-2017-06718
• 负责人: Eleftheriades, George
• 金额: $ 5.76万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=712347
• 关键词: Next; Generation; Engineered; Electromagnetic; Surfaces

In this program we will develop the next generation of engineered electromagnetic materials (metamaterials) and surfaces (metasurfaces) for the ultimate control of electromagnetic fields. In this effort, fundamental science and theory will be generated, new phenomena will be explored and/or discovered, and innovative structures to enable new applications will be pioneered. The science and technology to be produced is intended for applications from microwave to optical frequencies in four main disciplines: wireless communications, super-resolution imaging and medical therapy, and aerospace and defense. Metamaterials are engineered structures that can be homogenized at the scale of the corresponding wavelength where they operate and can thus be characterized by macroscopic material parameters such as a permittivity, a permeability and a refractive index. Such engineered materials should have properties that transcend those found in natural materials (hence the prefix 'meta'). For example, nowadays we can synthesize metamaterials characterized by a negative index of refraction. Likewise, metasurfaces are engineered surfaces with properties that can be homogenized (e.g. by a corresponding spatially varying impedance distribution) and have also exotic properties; For example they can bend light negatively and without suffering any reflections. Metasurfaces can be thought of as 2D metamaterials thus providing a unified theme for this proposed research program. Particular emphasis will be placed on metasurfaces, which is an emergent research front in which my group has been one of the leading groups internationally. Primarily, a paradigm shift approach will be developed for controlling electromagnetic waves (radio waves and light) using Huygens' metasurfaces. These are engineered surfaces composed of collocated electric and magnetic dipoles, thus enabling the full control of electromagnetic waves through "the equivalence principle" (generalization of the Huygens' principle). The developed theory of these Huygens' metasurfaces will greatly advance the science of engineered materials/metasurfaces and electromagnetism, whereas the corresponding technology developed will enable applications in imaging beyond the limits of diffraction for industrial, medical and biological applications, advanced multiband/broadband/multifunctional antennas for the next generation of terrestrial and satellite communications, futuristic "invisibility cloaks" for defence and related public security problems (e.g. to avoid collisions of commercial drones with civil-aviation aircrafts), wireless power transfer devices and networks to charge laptops, TVs and future electric cars, ultrathin optical lenses to enable the next generation of smartphones, highly-efficient solar cells enabled by light-trapping metasurfaces, and small radar sensors for autonomous vehicles.

在这个项目中，我们将开发下一代工程电磁材料（超材料）和表面（超表面），以最终控制电磁场。在这一努力中，将产生基础科学和理论，探索和/或发现新的现象，并开创创新结构，使新的应用成为可能。所产生的科学和技术旨在应用于从微波到光学频率的四个主要学科：无线通信、超分辨率成像和医疗、航空航天和国防。