中国物理B ›› 2023, Vol. 32 ›› Issue (11): 114210-114210.doi: 10.1088/1674-1056/acc2b0
Xiao-Ran Zheng(郑晓冉)1, Dan-Ni Ma(马丹妮)2, Guang-Tong Jiang(蒋广通)3,†, Cun-Lin Zhang(张存林)1, and Liang-Liang Zhang(张亮亮)1,‡
Xiao-Ran Zheng(郑晓冉)1, Dan-Ni Ma(马丹妮)2, Guang-Tong Jiang(蒋广通)3,†, Cun-Lin Zhang(张存林)1, and Liang-Liang Zhang(张亮亮)1,‡
摘要: The generation of terahertz (THz) waves by focusing a femtosecond pulsed laser beam at a distance is able to overcome the strong absorption properties of air and has rapidly attracted the attention of industry. However, the poor directionality of the THz wave radiation generated by this method is not conducive to THz wave applications. By controlling the morphology of the ultrafast laser-excited plasma filament and its electron density distribution through coherent beam combining technology, we achieve direct THz beam shaping and are able to obtain THz wave radiation of Gaussian or arbitrary transverse distribution. The novel experimental approach proposed in this paper opens up the research field of direct THz wave shaping using plasma. Moreover, it innovates multi-parameter convergence algorithms and, by doing so, has the potential to find beam patterns with higher energy conversion efficiency and break the energy limit of THz waves emitted by lasers at high power.
中图分类号: (Wave propagation, transmission and absorption)