Enhanced laser-induced plasma channels in air

Zuo Yanlei^{1, 2, 3}, Wei Xiaofeng^{1, 2, 3}, Zhou Kainan^{1, 2, 3}, Zeng Xiaoming^{1, 2, 3}, Su Jingqin^{1, 2, 3}, Jiao Zhihong¹, Xie Na^{1, 2}, Wu Zhaohui^{1, †,}

Axial edges (averaged over r) of the plasma density at the pulse front at various delays ((a) delay = 30 ns, (b) delay = 60 ns) and pulse energies (f = 100 mm).