Abstract-Propagation of terahertz waves in a dust acoustic wave

Peng-Fei Li, Cheng-Ran Du

https://arxiv.org/abs/2004.06258

The propagation of terahertz waves in a dust acoustic wave is investigated numerically. By assuming a sinus profile of the dust number density in the dust acoustic waves, the transmission properties are calculated using finite difference time domain method. It shows that the dust acoustic wave can function similarly as a Bragg filter to block the terahertz waves of a certain wavelength. The bandwidth of the filter depends on the density profile of the dust acoustic wave.

Abstract-Numerical simulation on terahertz wave propagation in plasma channels

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Dan Lua, Hui Gao, Jiayu Zhao, Bo Yang, Weiwei 
Liu, https://www.sciencedirect.com/science/article/pii/S0030402619300075

Terahertz (THz) wave generated by femtosecond laser filamentation can spatially constrained inside the plasma channels. Our simulation results show that this constraint to THz wave will gradually weaken with the increasing THz frequency. At the same time, results also indicate that the higher plasma density possesses the stronger constraint. In addition, the model field radius and width of THz wave will become larger with the increasing plasma channel radius. Based on the simulation results we find the changes of refractive index at THz wave play an important role on THz wave propagation in plasma channels.