摘要
相对论激光与等离子体相互作用中形成的纳米电子束在强激光场中的相干同步辐射是产生相干极紫外线和X射线辐射的独特方式.相对论激光脉冲的宽度和等离子体的各种参数决定了产生单个阿秒脉冲还是阿秒脉冲串.在激光脉冲持续时间只有少数几个光学周期下,其载波包络相位对阿秒脉冲有重要影响.通过控制载波包络相位在合适的范围,可以得到孤立阿秒脉冲.除了驱动激光的载波包络相位,等离子体密度分布梯度和等离子体厚度也会影响阿秒脉冲的特性.
Coherent synchrotron emission (CSE) from electron nanobunches formed by relativistic laser-plasma interaction in strong laser field is a unique way of producing coherent extreme ultraviolet (XUV) and X-ray radiation. Whether a single attosecond pulse or an attosecond pulse train depends on the width of the relativistic laser pulse and the various plasma parameters. The carrier envelope phase (CEP) in few-cycle laser pulses has an important effect on the generation of attosecond pulse. A single attosecond pulse can be obtained by controlling CEP in the appropriate range. In addition to the CEP of the driving laser pulse, the optimal combination of the plasma scale length L and the plasma thickness h with CEP is given.
作者
刘苹
张以辉
董全力
LIU Ping;ZHANG Yi-hui;DONG Quan-li(Shool of Physics and Optoelectronic Engineering, Ludong University, Yantai 264005, China)
出处
《烟台大学学报（自然科学与工程版）》
CAS
2019年第2期171-178,共8页
Journal of Yantai University(Natural Science and Engineering Edition)
基金
国家重点基础研究计划(2013CBA01500)
国家自然科学基金资助项目(11074297
11674146)
关键词
相干同步辐射
阿秒脉冲
载波包络相位
高次谐波
coherent synchrotron emission
attosecond pulse
carrier envelope phase
high-order harmonic
