Isolated elliptically polarized attosecond soft X-ray with high-brilliance using polarization gating of harmonics from relativistic plasmas at oblique incidence
Isolated elliptically polarized attosecond soft X-ray with high-brilliance using polarization gating of harmonics from relativistic plasmas at oblique incidence
复制标题
使用斜入射相对论等离子体谐波的偏振选通，获得具有高亮度的孤立椭圆偏振阿秒软 X 射线
DOI：
10.1364/oe.26.004572
复制
发表时间：
2018-02-19
期刊：
影响因子：
3.8
通讯作者：
Liu, Feng
中科院分区：
文献类型：
--
作者：
Chen, Zi-Yu;Li, Xiao-Ya;Liu, Feng
产生强烈的孤立阿秒脉冲是超快研究的主要目标。相对论等离子体镜在斜入射相互作用下产生高次谐波的最新进展产生了具有圆偏振或椭圆偏振的富光子阿秒脉冲。然而，使用当前可用的长驱动脉冲通过偏振选通实现隔离椭圆阿秒脉冲仍然是一个挑战，因为来自相对论等离子体的高次谐波的偏振选通被认为仅在垂直或接近垂直入射时才可能。在这里，我们用数字演示了围绕这个问题的方案。我们表明，通过管理激光偏振来控制等离子体动力学，可以门控具有高椭圆率的强烈单阿秒脉冲，延伸到斜入射的软 X 射线区域。因此，这种方法为使用当前激光技术对手性系统和磁性材料的动力学进行高时间分辨率探测的强大工具铺平了道路。 (C) 2018 年美国光学协会根据 OSA 开放获取出版协议条款
The production of intense isolated attosecond pulse is a major goal in ultrafast research. Recent advances in high harmonic generation from relativistic plasma mirrors under oblique incidence interactions gave rise to photon-rich attosecond pulses with circular or elliptical polarization. However, to achieve an isolated elliptical attosecond pulse via polarization gating using currently available long driving pulses remains a challenge, because polarization gating of high harmonics from relativistic plasmas is assumed only possible at normal or near-normal incidence. Here we numerically demonstrate a scheme around this problem. We show that via control of plasma dynamics by managing laser polarization, it is possible to gate an intense single attosecond pulse with high ellipticity extending to the soft X-ray regime at oblique incidence. This approach thus paves the way towards a powerful tool enabling high-time-resolution probe of dynamics of chiral systems and magnetic materials with current laser technology. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement