Abstract
Discharge gases have been used to detect terahertz (THz) waves, however, there are few relevant theoretical studies. The neon glow discharge model is established by COMSOL Multiphysics software, the characteristics of glow discharged neon and the interaction of the discharged gas with THz waves were investigated. The results show that with the increase of THz wave’s frequency, the transmittance increases, the change of plasma discharge characteristics caused by THz wave can be used for THz wave detection. The results provide a theoretical basis for the development of cheap, room temperature THz wave detector with fast response speed, and high sensitivity.
Highlights
Terahertz (THz) radiation spanning from 0.1 to 10 THz falls between the microwave and infrared spectral ranges [1]
We provided a theoretical basis for the development of a new type of THz wave detector based on neon glow discharge by investigating the characteristics of neon glow discharge and its interaction with THz waves
According to the volt-ampere characteristic curve of gas discharge, at first, due to the migration movement of electrons and positive ions, a small current is generated in the discharge tube, and the space charge formed by positive ions is conducive to the movement of electrons towards the anode in the tube
Summary
Terahertz (THz) radiation spanning from 0.1 to 10 THz falls between the microwave and infrared spectral ranges [1]. The interaction between gas discharge plasma and electromagnetic waves has been investigated in the infrared and microwave bands [8,9,10,11,12,13] These preliminary studies have shown that far infrared radiation with relatively high field amplitudes can be detected by GDDs, and the detection mechanism is attributed to the incident far infrared radiation increasing the energy of the plasma, which increase the discharge current. In the calculation of the variation of the dynamic parameters of the gas discharge system, the particle collision of Ne and Ne+, including elastic collision, excitation and ionization, and the surface reaction on the electrode surface should be considered.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
