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Impact-ionization mediated self-focusing of long-wavelength infrared pulses in gases
Optics Letters ( IF 3.1 ) Pub Date : 2019-02-04 , DOI: 10.1364/ol.44.000827
Xiaohui Gao , Bonggu Shim

We numerically investigate the propagation dynamics of intense long-wavelength infrared pulses in a weakly ionized argon gas and show that the pulses undergo self-focusing due to the transverse variations of electron-impact ionization caused by quivering electrons. We demonstrate this plasma-induced self-focusing at a power much lower than the critical power for Kerr self-focusing, and find that it can be controlled by the initial electron density and pulse duration.

中文翻译:

碰撞电离介导的气体中长波长红外脉冲的自聚焦

我们数值研究了强弱电离的氩气中长波长红外脉冲的传播动力学,结果表明,由于电子颤动引起的电子碰撞电离的横向变化,脉冲经历了自聚焦。我们展示了这种等离子体感应的自聚焦,其功率远低于Kerr自聚焦的临界功率,并且发现它可以由初始电子密度和脉冲持续时间控制。
更新日期:2019-02-15
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