Generation of short pulse THz radiation by interaction between ultra short pulse laser and magnetized plasmas

等离子体中的振荡电流可以产生辐射。由于等离子体中的电子等离子体波随等离子体频率振荡，而等离子体频率与等离子体密度的平方根成正比，因此我们可以预期等离子体会产生高频辐射。然而，由于截止，发射的辐射受到强烈的阻尼。我们对等离子体施加磁场，观察到脉冲持续时间为200ps的微波频段辐射。

The oscillating current in the plasma can generate the emission of radiation. Because the electron plasma wave in the plasma oscillates with the plasma frequency, which is proportional to the square root of plasma density, we can expect the high frequency radiation from the plasma. However, the emitted radiation is strongly damped due to the cutoff. We applied the magnetic field to the plasma and we observed the radiation with pulse duration of 200ps and in the microwave frequency region.