双层SRR可动悬臂阵列太赫兹动态滤波器

摘要

A novel method is demonstrated to realize dynamical control of resonant response of terahertz metamaterials. The paper presents a type of structurally tunable terahertz meta-materials (SMM) which consists of double layer Split-ring Resonators (SRRs) with one flexible cantilever sitting along the gap. Based on the difference of expansion coefficient between the double materials (i.e. Al and SiO2), fine tuning of the cantilever angles can be conveniently adjusted by the temperature difference. By changing the radius of curvature of the cantilevers, we obtain a tunable terahertz band-stop filter with a wide tuning range about 0.32 THz. This tunable band-stop filter using deformation MMs shows its great potential in tunable metamaterials applications, such as sensors, switches, modulators and phase shifters.%本文设计了一种三维双层开口谐振环可动悬臂阵列，利用双层材料(Al 和SiO2)之间热膨胀系数的差异，温度控制悬臂的弯曲形变，根据悬臂的可弯曲性来实现太赫兹传输的动态可调，设计出一个太赫兹可调阻带滤波器，可调范围达到0.32 THz。该研究结果对太赫兹可控功能器件如传感器，调制器以及相移器等器件研发具有一定的借鉴意义。