可调介质超材料研究进展

超材料由于具有自然界材料所不具备的一些独特的电磁和光学特性而被广泛关注与研究。相比于传统金属结构超材料,介质超材料不仅可以低损耗地实现超常电磁特性,而且对外场具有很高的敏感度,其电磁参数随磁场、电场、温度等外场的变化而改变,因而受到了功能材料和信息器件领域研究者的广泛关注。分别从磁可调、电可调和温度可调3个方面介绍可调介质超材料。首先,对于磁可调介质超材料,介绍了基于铁氧体的多种磁可调结构的研究进展以及铁磁谐振原理;其次,对于电可调介质超材料,介绍了基于石墨烯、变容二极管和液晶材料的多种电可调结构的研究进展;最后,对于温度可调介质超材料,介绍了基于二氧化钒、锑化铟和钛酸锶材料实现温度可调性能的研究进展及其相应物理机制,并展望了可调介质超材料的发展趋势和潜在应用。

Research Progress of Tunable Dielectric Metamaterials

Metamaterials have attracted considerable attention and research owing to their unique electromagnetic and optical properties,which cannot be realized in natural materials.Compared with traditional metal-based metamaterials,dielectric metamaterials have both exotic electromagnetic properties and high sensitivity,whose electromagnetic parameters can be tuned by magnetic field,electric field and temperature,etc.Therefore,they attract much attention from the area of materials and information function devices.This paper summarizes the tuning methods of the tunable dielectric metamaterials from three aspects:magnetically tunable,electrically tunable and thermally tunable.Firstly,for magnetically tunable dielectric metamaterials,both the research progress of various magnetically tunable structures based on ferrite and the relevant ferromagnetic resonance principles are introduced.Secondly,for electrically tunable dielectric metamaterials,the research progress of various electrically tunable structures based on graphene,varactor diode and liquid crystal material is introduced.Finally,for the thermally tunable dielectric metamaterials,the metal-insulator phase transition mechanism based on vanadium dioxide is introduced to realize the thermally tunable performance.Additionally,the research progress and physical mechanism of the thermally tunable performance based on indium antimonide and strontium titanate materials are introduced.The development trend and potential applications of tunable dielectric metamaterials are prospected.