通过等离子体中秒双曲激光脉冲的光学整流产生外部静电场辅助太赫兹辐射

IF 2 3区物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS

Physics of Plasmas Pub Date : 2024-08-16 DOI:10.1063/5.0223433

Vivek Kumar Shukla, Monika Singh, Saba Hussain, Ram Kishor Singh

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引用次数: 0

摘要

在无碰撞等离子体中，研究了外部施加的静态电场对产生高功率太赫兹（THz）辐射的促进作用。在太赫兹辐射频率下会出现非线性瞬态电流密度，这是由于具有秒双曲时间强度曲线的高功率激光脉冲发生了光学整流。这种驱动太赫兹辐射的瞬态电流在很大程度上取决于激光脉冲宽度、电子等离子体频率和外加电场。此外，还研究了所产生的太赫兹波与激光之间相位不匹配的影响。数值模拟显示，太赫兹振幅的强度最初会随着传播距离的增加而增加，然后减小。

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External static electric field assisted THz radiation generation via optical rectification of secant hyperbolic laser pulse in a plasma

In collisionless plasma, the function of an externally imposed static electric field has been investigated for facilitating the generation of high-power terahertz (THz) radiation. A nonlinear transient current density occurs at THz radiation frequency due to the optical rectification of high-power laser pulse having secant hyperbolic temporal intensity profile. This transient current driving a THz radiation is found to be strongly depended on the pulse width of laser, electron plasma frequency, and externally applied electric field. The effect of mismatched phase between the generated THz wave and laser has also been studied. Numerical simulations show that the strength of THz amplitude initially increases with propagation distance and then decreases.

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来源期刊

Physics of Plasmas 物理-物理：流体与等离子体

CiteScore

4.10

自引率

22.70%

发文量

653

审稿时长

2.5 months

期刊介绍： Physics of Plasmas (PoP), published by AIP Publishing in cooperation with the APS Division of Plasma Physics, is committed to the publication of original research in all areas of experimental and theoretical plasma physics. PoP publishes comprehensive and in-depth review manuscripts covering important areas of study and Special Topics highlighting new and cutting-edge developments in plasma physics. Every year a special issue publishes the invited and review papers from the most recent meeting of the APS Division of Plasma Physics. PoP covers a broad range of important research in this dynamic field, including: -Basic plasma phenomena, waves, instabilities -Nonlinear phenomena, turbulence, transport -Magnetically confined plasmas, heating, confinement -Inertially confined plasmas, high-energy density plasma science, warm dense matter -Ionospheric, solar-system, and astrophysical plasmas -Lasers, particle beams, accelerators, radiation generation -Radiation emission, absorption, and transport -Low-temperature plasmas, plasma applications, plasma sources, sheaths -Dusty plasmas