Excitation of terahertz radiation by parametric mixing of four waves in magnetized plasma

被引：3

作者：

Mann, Kusum Lata ^{[1
]}

Sajal, Vivek ^{[1
]}

Panwar, Anuraj ^{[1
]}

Sharma, Navneet K. ^{[1
]}

机构：

[1] Jaypee Inst Informat Technol, Dept Phys & Mat Sci & Engn, A-10,Sect 62, Noida 201307, UP, India

来源：

OPTIK | 2019年 / 186卷

关键词：

THz radiation generation; Magnetized plasma; Stimulated Raman scattering; GENERATION; PULSES; RECTIFICATION; LASERS;

D O I：

10.1016/j.ijleo.2018.12.041

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

THz radiation may be excited by nonlinear mixing of two counter-propagating laser beams, having frequency difference omega(1) similar to omega(2) >= 2 omega(p), in under dense plasma. Beating laser beams exert nonlinear ponderomotive force on plasma electrons and excite a nonlinear density perturbation. The nonlinear density perturbation drives a non-resonant space charge mode which may excite a pair of plasma wave and back scattered electromagnetic terahertz wave at resonance. The presence of transverse magnetic field further enhances the growth of THz wave. The transverse magnetic field also tunes the amplitude and frequency of THz wave. The maximum growth rate of excitation process Gamma similar to 6.22 x 10(-6) s(-1) is achieved for applied magnetic field similar to 175 kG.

引用

收藏

页码：182 / 186

页数：5

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