The mechanism of generation of terahertz (THz) radiation with beating of two supergausssian lasers in corrugated density plasma containing hot electron-positron (e-p) is revisited. Resonance condition for optical excitation of THz emission is reported to be modified due to finite temperature of plasma species (electrons-positrons to the few order keV range) in the presence of weak collisions. The collision frequency is optimized to the range ν ≤ 0.5 ω p in the e-p plasma depending on the temperature and collisional rates. The effect of electron temperature, collision frequency and suitability of supergaussian laser is investigated on phase modulation to achieve highest emitted THz field with 6% efficiency of the mechanism.

中文翻译：

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热电子对电子-正电子碰撞等离子体中超高斯激光器的殴打对太赫兹辐射的光激发的影响

再次探讨了在包含热电子-正电子（ep）的波纹密度等离子体中，两个超高斯激光器拍打产生太赫兹（THz）辐射的机理。据报道，由于存在弱碰撞，等离子体种类的有限温度（电子-正电子到几个keV范围），太赫兹发射光激发的共振条件被修改。根据温度和碰撞率，在ep等离子体中将碰撞频率优化到ν≤0.5ωp的范围。研究了电子温度，碰撞频率和超高斯激光的适用性对相位调制的影响，以达到最高发射THz场的效果，其效率为6％。