Numerical study on the modulation of THz wave propagation by collisional microplasma photonic crystal

作     者：Shuqun WU Yuxiu CHEN Minge LIU Lu YANG Chaohai ZHANG Shaobin LIU 吴淑群;陈玉秀;刘敏格;杨璐;张潮海;刘少斌

作者机构：College of Automation EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016People's Republic of China College of Electronic and Information EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016People's Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2020年第22卷第11期

页      面：42-51页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：supported by National Natural Science Foundation of China(No.51977110) 

主　　题：microplasma plasma photonic crystal terahertz wave electron density 

摘      要：In order to demonstrate the modulation of terahertz wave propagation in atmospheric pressure microplasmas,in this work,the band structure and the transmission characteristics of a onedimensional collisional microplasma photonic crystal are investigated,using the transfer matrix *** a lattice constant of 150μm and a plasma width of 100μm,three stopbands of microplasma photonic crystal are observed,in a frequency range of 0.1-5 ***,an increase in gas pressure leads to a decrease in the central frequency of the *** the gas pressure increases from 50.5 k Pa to 202 k Pa,the transmission coefficient of the THz wave first increases and then decreases at high frequency,where the wave frequency is much greater than both the plasma frequency and the collision ***,it is interesting to find that the central frequency and the bandwidth of the first THz stopband remain almost unchanged for electron densities of less than 10^15 cm^-3,increasing significantly when the electron density increases up to 10^16 cm^-3.A central frequency shift of 110 GHz,and a bandgap broadening of 200 GHz in the first stopband are *** addition,an atmospheric pressure microplasma with the electron density of 1×10^15-6×10^15 cm^-3 is recommended for the modulation of THz wave propagation by plasma photonic crystals.