The Study Status and Development of Metamaterial Absorber

Abstract

Metamaterial with superior physical properties is a new type of artificial electromagnetic material. Absorbing material is used widely on stealth weapons of aircraft, missiles, ships, tanks and other more extensive application. the improvement in performance of the metamaterial absorbing body can design new unit structure, design and research the optimized algorithm, use new materials and hybrid materials, explore and combine with new concept, etc. Firstly introduces the working principle of absorbing material and the research progress of absorbing materials and terahertz metamaterials. Finally, the research status of the metamaterial absorber is summarized at the domestic and foreign. Keywords-Physical Properties; Electromagnetic; Metamaterial; Absorber; Terahertz I. INTRODUCTION Metamaterials usually refers to the Artificial Microstructures of composite materials, and it has extraord inary physical properties which natural materials do not have [1-3]. The behavior of metamaterials depends mainly on the artificial structure design.With the progress of electronic technology and the rapid development of the information society, the problem of the interference of the electromagnetic radiation has became a hot research issue in the world. The metamaterials have become a hot spot of research in the field of physics and materials science because it exhib its extraordinary electromagnetic properties. It has a good application prospect in th e terahertz and optics [4, 5]. At present, the research direction of metamaterials mainly focuses on: a. the new metamaterial and its design of function, optimization of performance, simulation algorithm; b. the manufacturing device: device fabrication requires high technical level in optical frequency band , because of the sub wavelength size constraints [6-7] ; c. study on the interaction: the majority of the properties of metamaterials related to the surface / interface waves. In order to further explore coupling of the near field wave and electromagnetic wave in the free space [8] 。The hotspot applications of metamaterials are as follows: using metamaterials and its characteristics to design and product the various kinds of metamaterial absorbers. Through the me tamaterial structure make it realized perfect stealth metamaterials which is invisibility cloak. The metamaterial is applied to microwave circuit or antenna to improve its performance. Materials mainly focus on the following aspects: