碰撞等离子体尾场产生强太赫兹辐射
Strong Terahertz Radiation Generation via Wakefield in Collisional Plasma
摘要：
我们表明，尾流场的横向分量可以产生与应用程序的外部磁场，产生辐射在太赫兹范围内。为此，我们进行了分析和数值计算，以评估在碰撞等离子体的现实情况下的尾流场的组件。我们观察到，在外部磁场的方向上的尾场的产生，虽然尾场的分量被观察到在平行和垂直于激光和磁场的传播方向的方向。基于准静态近似下的微扰技术，研究了超高斯分布激光尾流场辐射脉冲的大小。当施加较强的磁场时，THz辐射的场被发现增强;对于较高折射率的激光器，情况也是如此。
英文摘要：
We show that the transverse component of the wakefield can be produced with the application of an external magnetic field that generates radiation in the THz range. For this, we carry out analytical and numerical calculations to evaluate the components of the wakefield in a realistic situation of collisional plasma. We observe that the wakefield in the direction of the external magnetic field is produced, though the components of the wakefield are observed in the directions parallel and perpendicular to the direction of propagation of the laser and the magnetic field. Based on the approach of perturbation technique under quasi-static approximation, a study is made on the magnitude of emitted radiation pulses from the wakefield for the case of lasers of super-Gaussian profile. The field of THz radiation is found to be enhanced when stronger magnetic field is applied; the same is the case for the lasers of higher index.
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