A scheme of phase-matched terahertz generation by beating two co-propagating lasers in magnetized plasma, in the presence of a magnetosonic wave (MSW), is developed. The beat frequency ponderomotive force of the lasers imparts an oscillatory drift to electrons. The electron drift velocity couples with the electron density perturbation associated with the MSW to produce an irrotational nonlinear current $\left(\nabla \times {\vec J}\;{}^{\rm NL}\ne 0\right)$ . The beat current density resonantly excites a THz (Terahertz) radiation when the phase-matching conditions are satisfied. The MSW mediates the phase matching. At 9.6 and 10.6 µm wavelengths, and background magnetic field of 285 kG, one may achieve normalized THz wave amplitude of the order of 10−3 and one obtains the ratio of THz power to pump power of the order of 10−6.

中文翻译：

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等离子体中激光的非线性混合产生的磁波辅助太赫兹发射

提出了一种在磁声波（MSW）存在下通过在磁化等离子体中击败两个共同传播的激光器来产生相位匹配太赫兹的方案。激光器的拍频伪动力使电子产生振荡漂移。电子漂移速度与与MSW相关的电子密度扰动耦合，产生非旋转非线性电流 $ \ left（\ nabla \ times {\ vec J} \; {} ^ {\ rm NL} \ ne 0 \ right）$ 。当满足相位匹配条件时，拍频电流密度会谐振地激发THz（Terahertz）辐射。MSW调解相位匹配。在9.6和10.6 µm波长，背景磁场为285 kG时，可以实现10 -3量级的归一化THz波幅 而获得的太赫兹功率与泵浦功率之比约为10 -6。