可调控太赫兹吸收器调制方法

Design of tunable terahertz absorber modulation method

设计了一种窗棂夕阳图案太赫兹超材料吸收器。利用这种图形,从超材料太赫兹吸收器结构出发,分别通过改变顶层图案几何尺寸、中间层电介质厚度、顶层图案开口处的硅电导变化率等,设计可调控太赫兹波双频、三频、四频吸收器。重点分析了顶层图案开口处的硅电导率变化的可调控太赫兹波双频吸收器机理,其低频吸收峰吸收率由68. 7%增至99. 9%,同时低频吸收峰频率1. 043 THz红移至1. 005 THz,产生38 GHz偏移,可以实现连续频率调谐。并提出进一步深入研究本课题的建议。

A multi-hertz dual and multi-frequency metamaterial absorber with window lattice was designed.By changing the geometry size of top-level,the middle dielectric layer thickness and the electrical conductivity of silicon gap on top layer,the tunable dual,three or four metamaterials absorber operating in terahertz frequency were realized.The absorption mechanism of dual-frequency absorber was analyzed.The efficiency of low absorption peak increases from 68.7%to 99.9%,while the absorption at 1.043 THz red shifts to 1.005 THz,resulting in 38 GHz deviation and the continuous tuning can be achieved.And the suggestion of further research this topic was put forward.