基于超材料吸波器的通用电磁能量转换适配器。

A universal electromagnetic energy conversion adapter based on a metamaterial absorber.

机构信息

Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716 USA.

Glenn Research Center, National Aeronautics and Space Administration, Cleveland, Ohio 44135 USA.

出版信息

Sci Rep. 2014 Sep 9;4:6301. doi: 10.1038/srep06301.

DOI:10.1038/srep06301

PMID:25200005

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4158331/

Abstract

On the heels of metamaterial absorbers (MAs) which produce near perfect electromagnetic (EM) absorption and emission, we propose a universal electromagnetic energy conversion adapter (UEECA) based on MA. By choosing the appropriate energy converting sensors, the UEECA is able to achieve near 100% signal transfer ratio between EM energy and various forms of energy such as thermal, DC electric, or higher harmonic EM energy. The inherited subwavelength dimension and the EM field intensity enhancement can further empower UEECA in many critical applications such as energy harvesting, photoconductive antennas, and nonlinear optics. The principle of UEECA is understood with a transmission line model, which further provides a design strategy that can incorporate a variety of energy conversion devices. The concept is experimentally validated at a microwave frequency with a signal transfer ratio of 96% by choosing an RF diode as the energy converting sensor.

摘要

继超材料吸收体（MA）能够实现近乎完美的电磁（EM）吸收和发射之后，我们提出了一种基于 MA 的通用电磁能转换适配器（UEECA）。通过选择适当的能量转换传感器，UEECA 能够在 EM 能量和各种形式的能量（如热能、直流电能或更高阶的 EM 能量）之间实现近 100%的信号传输比。所继承的亚波长尺寸和 EM 场强度增强可进一步使 UEECA 在许多关键应用中（如能量收集、光导天线和非线性光学）发挥作用。通过传输线模型来理解 UEECA 的原理，这进一步提供了一种设计策略，可以将各种能量转换设备集成在一起。该概念在微波频率下通过选择射频二极管作为能量转换传感器进行了实验验证，实现了 96%的信号传输比。