电子密度对太赫兹波在均匀非磁化等离子体中的传输影响

Effect of electron densities on the transmission of terahertz waves in uniform non-magnetized plasma

针对地面与飞行器之间通信“黑障”问题,采用垂直极化的太赫兹波实现了地面与飞行器的通信。利用放电装置产生等离子体来模拟飞行器表面的等离子体鞘套,使用全光纤耦合式太赫兹时域光谱仪产生0~1 THz的太赫兹波,从实验的角度研究了垂直极化太赫兹波在不同电子密度的均匀非磁化等离子体中的传输特性。实验结果表明:电子密度越大,垂直极化太赫兹在等离子体中的传播速度越快;随着电子密度的增大,衰减会越小。所进行的研究为实现地面与飞行器之间的通信互联提供了重要的实验参考。

In order to solve the problem of communication between the ground and the aircraft,which is called“black barrier”,the vertically polarized terahertz wave is used to realize communication.Using the discharge device to generate plasma to simulate the plasma sheath on the surface of the aircraft,and an all-fiber coupled terahertz time-domain spectrometer is used to generate 0-1 THz waves.This paper studies the transmission characteristics of vertically polarized terahertz waves in uniform non-magnetized plasma with different electron densities from an experimental point of view.The experimental results show that the greater electron density,the faster propagation speed of the vertically polarized terahertz in the plasma;as the electron density increases,the attenuation becomes smaller.This research provides an important experimental reference for realizing the communication interconnection between the ground and the aircraft.