Xie Jiajie, Wang Zitao, Li Mengting, Deng Zhigang, Teng Jian, Zhang Bo, Tian Chao, Wu Yuchi, Gu Yuqiu, Zhou Weimin, Li Tingshuai
Opt Lett. 2024 Aug 1;49(15):4114-4117. doi: 10.1364/OL.532085.
High-power laser interacting with matter generates intense electromagnetic pulses (EMPs), which are closely associated with laser and target parameters. In this study, EMPs induced by picosecond (ps) laser coupling with solid targets are recorded at the XG-III laser facility. Gold wire targets produce more intense EMPs with a maximum EMP value of 608 kV/m compared to some planar targets. EMP propagation in the normal direction is highly coincident with the expansion of detected hot electrons, which is verified by the particle-in-cell simulations. This work is expected to pave, to our knowledge, a new avenue for directional guidance of laser-driven EMPs.
高功率激光与物质相互作用会产生强烈的电磁脉冲（EMPs），这些电磁脉冲与激光和靶材参数密切相关。在本研究中，在神光III激光装置上记录了皮秒（ps）激光与固体靶耦合产生的电磁脉冲。与一些平面靶相比，金线靶产生的电磁脉冲更强，最大电磁脉冲值为608 kV/m。电磁脉冲在法线方向的传播与探测到的热电子的扩展高度一致，这通过粒子模拟得到了验证。据我们所知，这项工作有望为激光驱动电磁脉冲的定向引导开辟一条新途径。
