Houard Aurélien, Liu Yi, Prade Bernard, Tikhonchuk Vladimir T, Mysyrowicz André
Laboratoire d'Optique Appliquée, ENSTA, Ecole Polytechnique, CNRS UMR 7639, Palaiseau, 91761 France.
Phys Rev Lett. 2008 Jun 27;100(25):255006. doi: 10.1103/PhysRevLett.100.255006. Epub 2008 Jun 26.
We observe a 3 order of magnitude enhancement of the terahertz energy radiated by a femtosecond pulse undergoing filamentation in air in the presence of a static electric field. Measurements of terahertz pulse duration, spectrum, polarization, and radiation pattern elucidate the physical processes responsible for this radiation. A theoretical model explains the results and predicts another 3 orders of magnitude enhancement with a terawatt laser pulse.
我们观察到，在存在静电场的情况下，飞秒脉冲在空气中发生丝状化时辐射的太赫兹能量增强了3个数量级。对太赫兹脉冲持续时间、光谱、偏振和辐射模式的测量阐明了产生这种辐射的物理过程。一个理论模型解释了这些结果，并预测使用太瓦级激光脉冲时能量将再增强3个数量级。
