基于VO_2相变可调制的复合结构异向介质的研究
The Tunable Hybrid Meta-Material Based on Vanadium Oxide Phase Transition

设计了一种新颖的太赫兹频段的复合结构异向介质,并用仿真软件对其进行模拟研究.当十字叉结构有效长度发生改变时,复合异向介质的谐振频率也发生改变.这种改变是由于连在十字叉4个顶点的二氧化钒(VO2)薄膜桥的金属-绝缘相变导致的结果.模拟结果表明:该复合结构产生的双带谐振,而且这种结构的复合异向介质具有可调制性、频率灵敏性、容易制作和无偏振等特点.
A tunable hybrid metamaterial in THz band was designed and simulated.The resonance frequencies shift of this hybrid structure is obtained by actively varying the effective length of electrically resonant cross.This was realized by using Vanadium dioxide(VO2)film bridges that can be triggered the insulator-metal phase transition at the four tops of the cross structure.Simulation results present that dual band resonances come from the individual structure.So this hybrid metamaterial based on VO2 phase transition shows some advantages such as tunability,frequency agility,easily fabrication and polarization independency in THz band