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提出一种表层电磁谐振器呈螺旋环的超材料太赫兹吸波器.与常规的超材料吸波器不同,在材料的种类及厚度都不变的情况下,仅通过改变表面螺旋环的环数或环的起始和终止位置,就能有效地调节螺旋环超材料的太赫兹响应性能.研究发现,该超材料的响应频率的仿真值与驻波理论计算值基本吻合,说明螺旋环超材料的响应机理可以通过驻波理论解释、其响应频率具有可预计性.为了探究螺旋环超材料的响应机理,还比较研究了闭合圆环及开口圆环超材料吸波器的性能.结果表明,螺旋环、闭合圆环、开口圆环三种超材料吸波器具有部分类似的太赫兹响应性能.但是,与另外两种超材料不同,螺旋环超材料的表层电磁谐振器是半径连续变化的螺旋环、具有更强的耦合作用以及更加简便和灵活的性能调节方式.研究成果对超材料的理论及设计研究有新的启示.
A kind of metamaterial terahertz wave filter whose surface electromagnetic resonator is a spiral ring is proposed, which is different from the conventional metamaterial wave absorbers only in the case that the material type and the thickness are the same, Number or ring start and end position, can effectively adjust the terahertz response performance of the spiral ring metamaterials. The study found that the simulation value of the response frequency of the meta-material basically consistent with the calculated value of the standing wave theory shows that the spiral ring super The response mechanism of materials can be explained by the theory of standing wave and its response frequency is predictable.In order to explore the response mechanism of helical ring metamaterials, the properties of closed circular rings and open circular metamaterials absorbers are also studied. , Spiral ring, closed ring, open ring three kinds of metamaterial absorbers have some similar characteristics of the terahertz response.However, with the other two metamaterials, the surface of the spiral ring metamaterials electromagnetic resonator is a continuous change in radius Of the spiral ring, with a stronger coupling and easier and more flexible performance adjustment methods.The research results have new implications for the theory and design of metamaterials.