Generation of vortex <i>N</i> <sub>2</sub> <i/> <sup>+</sup> lasing
Yue HuEast China Normal UniversityZhengjun YeHanxiao LiNaval Research InstituteChenxu LuFei ChenJiawei WangShengzhe PanMin ZhangJian GaoChongqing Institute of East China Normal UniversityJian WuCAS Center for Excellence in Ultra-intense Laser Science
2023en
ABI
Abstract
Harnessing structured light is fascinating for its multidisciplinary applications, e.g., in remote driving microrobots, sensing, communications, and ultrahigh resolution imaging. Here, we experimentally demonstrated the generation of a vortex N 2 + lasing pumped by a wavefront structured near-IR femtosecond pulse with orbital angular momentum. The topological charge of the N 2 + lasing was measured to be twofold that of the pump beam. Compared to the case with a pump beam of a plane wavefront, the N 2 + lasing generation efficiency is much higher for the vortex pump beam at high pumping energy, which has a higher clamping intensity by reducing the on-axis plasma density. Our results herald a march toward remote structured N 2 + lasing.
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Cited by 30 references