Intense terahertz-pulse generation by four-wave mixing process in induced gas plasma

S. Wicharn; P. Buranasiri

doi:10.1117/12.2186931

31 August 2015 Intense terahertz-pulse generation by four-wave mixing process in induced gas plasma

S. Wicharn, P. Buranasiri

Proceedings Volume 9546, Active Photonic Materials VII; 954621 (2015) https://doi.org/10.1117/12.2186931
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

Abstract

In this article, we have numerically investigated an intense terahertz (THz) pulses generation in gaseous plasma based on the third-order nonlinear effect, four-wave mixing rectification (FWMR). We have proposed that the fundamental fields and second-harmonic field of ultra-short pulse lasers are combined and focused into a very small gas chamber to induce a gaseous plasma, which intense THz pulse is produced. To understand the THz generation process, the first-order multiple-scale perturbation method (MSPM) has been utilized to derive a set of nonlinear coupled-mode equations for interacting fields such as two fundamental fields, a second-harmonic field, and a THz field. Then, we have simulate the intense THz-pulse generation by using split step-beam propagation method (SS-BPM) and calculated output THz intensities. Finally, the output THz intensities generated from induced air, nitrogen, and argon plasma have been compared.

Citation Download Citation

S. Wicharn and P. Buranasiri "Intense terahertz-pulse generation by four-wave mixing process in induced gas plasma", Proc. SPIE 9546, Active Photonic Materials VII, 954621 (31 August 2015); https://doi.org/10.1117/12.2186931

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