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在10 THz时观察来自DC偏差光线的形辐射

G E Rizaev, L V Seleznev, I A Nikolaeva

|June 15, 2023

概括

静电场改变了来自空气中的五秒激光丝的太赫兹 (THz) 辐射. 这就是THz排放的THz.

科学领域:

物理物理学物理
光学是什么?光学是什么?
激光科学激光科学

背景情况:

使用女性秒激光纤维在空气中产生太赫兹 (THz) 辐射是一个关键的研究领域.
THz辐射的角分布和频谱受线条件的影响.
带有静电场的偏向的秒激光诱导的空气等离子体可以修改THz的发射特性.

研究的目的:

为了研究静电场对飞秒激光丝在空气中发射的THz辐射的影响.
在电场偏差下分析不同频率的THz辐射的角分布.

主要方法:

在空气中使用740nm,1.8mJ,90fs脉冲生成一个femtosecond激光丝.
将15kV/cm静电场偏差应用于气体丝.
测量不同频率的THz辐射的角分布.

主要成果:

在电场偏差下,THz辐射表现出0.5-1 THz之间的轴上平顶角分布.
在10 THz时观察到过渡到一个明显的环形角分布.
这与在公正方案中观察到的典型轴上排放形成鲜明对比.

结论:

静电场偏差显著改变了来自空气丝的THz辐射的角度分布.
观察到的依赖频率的变化,从平顶到环状的发射,提供了洞察力THz的发电机制.
这种对THz排放特征的受控修改为量身定制的THz源开发提供了可能性.

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