Propagation characteristics of terahertz wave in inductively coupled plasma

Abstract

Firstly, the electron density distribution of inductively coupled plasma (ICP) is measured by laser Thomson scattering (TS) method and the features of the ICP under the same experimental conditions are simulated by finite element method (FEM). The simulated results are in good agreement with the experimental results, which verifies the accuracy of the ICP generation simulation model. Secondly, the propagation characteristics of terahertz wave in ICP are measured by terahertz time domain spectroscopy (THz-TDS) and calculated by FEM according to the electron density distribution of ICP simulated in the first step above. The high consistency between the experimental and simulation results of terahertz wave propagation characteristics in ICP further proves the accuracy of terahertz wave transmission model in plasma and the feasibility of joint simulation with ICP generation simulation model.

Magnetic induced terahertz modulation characteristics based on ferromagnetic nematic liquid crystals

“…In recent times, THz technology have made great progress in basic research fields such as biological diagnosis, medical imaging, and wireless communication [7][8][9][10][11]. Artificial electromagnetic materials, such as photonic crystals (PCs), metamaterials, and plasma elements, have been extensively studied and used to modulate THz waves [12][13][14]. THz magneto-optical (MO) elements, controlled by an external magnetic field, are integral parts of the field of broadband amplitude modulation [15,16].…”

Plasma and Terahertz-Wave Propagation Characteristics in Atmospheric-Pressure Plasma Jet Under Different Operating Conditions

“…Jang et al employed terahertz time domain spectroscopy (THz-TDS) to diagnose electron density and collision frequency information in an inductively coupled plasma (ICP) source, and analyzed the effects of RF power and gas pressure on electron density [16][17]. Sun et al verified the feasibility of ICP and THz wave transmission combined model based on THz-TDS and laser Thomson scattering method, and the effect of RF power and gas pressure on the terahertz transmission characteristics in ICP was further discussed [18]. The plasma sources concerned in the above terahertz wave transmission researches are all ICP devices due to its high-density characteristics.…”