论文部分内容阅读
利用传输矩阵方法研究了掺杂半导体n-GaAs/聚碳酸脂一维光子晶体的太赫兹波透射谱.研究结果发现,与一般由两种介电材料组成的一维光子晶体不同,由于掺杂半导体中自由载流子对太赫兹波存在较强的吸收,所以这种材料组成的一维光子晶体除可形成光子带隙外,还可以增强n-GaAs对太赫兹波的透射.同时还提出了一种基于这种一维光子晶体的太赫兹波调制器,通过外加电压控制半导体中电子浓度的大小可实现对太赫兹透射波幅度的调制.
The transmission matrix method was used to study the terahertz wave transmission spectra of doped n-GaAs / polycarbonate one-dimensional photonic crystals. The results show that, unlike the one-dimensional photonic crystals usually composed of two dielectric materials, In semiconductors, free carriers have strong absorption of terahertz waves, so the one-dimensional photonic crystal composed of this material can enhance the transmission of terahertz waves by n-GaAs besides photonic bandgap formation. A terahertz-wave modulator based on such a one-dimensional photonic crystal can modulate the amplitude of terahertz transmission wave amplitude by controlling the size of the electron concentration in the semiconductor by applying a voltage.