可调谐太赫兹等离子诱导透明的研究

Study on transparency structure induced by tunable terahertz plasmon

为了获得一个较宽的等离子诱导透明(PIT)窗口,提出了一种双层可调谐的太赫兹超材料结构。采用仿真方法对该结构的透过率谱、电场图和电流图进行了分析,并通过数学模型分析了透射窗口形成机理。结果表明,该结构可以使亮模式谐振器的移动空间更大,而且可以得到一个较宽的透射窗口;该结构能通过平移I形金属棒的位置进而控制PIT窗口的宽度。仿真结果与理论结果拟合得很好。

In order to obtain a wider plasma induced transparency( PIT) window, a dual layer tunable terahertz metamaterial structure was proposed. The transmission spectrum,electric field diagram and current diagram of the structure were simulated and analyzed. The formation mechanism of transmission window was analyzed by a mathematical model. The results show that the structure makes the move space of light-mode resonator wider and a wider transmission window can be obtained.The structure can change the width of PIT window by moving the position of I-shaped metal bar. The simulation results are well fitted with the theoretical results.