2026-10-13T22:38:21Z https://www.scidb.cn/oai

10.57760/sciencedb.06429 2022-11-16T15:33:47Z

2022-11-16 Divergence of high-order harmonic generation by a convex plasma surface doi:10.57760/sciencedb.06429 en The electron density profile on a plasma surface has a decisive influence on the mechanism and characteristics of the plasma high-order harmonic generation. When the pre-pulse has a similarspatial and temporal distribution as the main laser pulse, the plasma surface on the target will expand to form a convex profile of the similar size as the focal spot of the main pulse. We experimentally observed that the divergence of the harmonics generated by the relativistic laser light incident on a silica target has a saddle-shaped structure. The two-dimensional particle-in-cell simulation with convex plasma surfaces explains the experimental results very well and infers a 0.12λ_L plasma scale length around the center of the convex profile. Further, we qualitatively explained that the asymmetry of the saddle-shaped harmonic divergence is caused by oblique incidence. The data set includes experimental data, physical images and simulated data. laser-plasma interaction; high-intensity laser; strong field physics; high-order harmonic generation; plasma surface YANG Chun ZHOU ChuLiang ZHENG YingHui ZHANG DongDong GAO JiXing BAI YaFeng QI Rong QIAN JiaYi GUI JiaYan ZHANG ZongXin TIAN Ye ZENG ZhiNan PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset http://www.doi.org/10.3390/ app12115745 Science Data Bank