Towards intense isolated attosecond pulses from relativistic surface high harmonics
Towards intense isolated attosecond pulses from relativistic surface high harmonics
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DOI：
10.1364/optica.6.000280
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发表时间：
2019-03-20
期刊：
影响因子：
10.4
通讯作者：
Karsch, Stefan
中科院分区：
文献类型：
--
作者：
Jahn, Olga;Leshchenko, Vyacheslav E.;Karsch, Stefan
相对论表面高次谐波被认为是在极端紫外线和X射线光谱范围内产生强孤立阿秒脉冲的唯一来源。然而，它们的实际实现仍然是一项具有挑战性的任务，需要确定最佳的实验条件和参数。在这里，我们提出了测量和粒子模拟来确定最重要的参数的最佳值。特别地，我们研究了谐波效率、发散和光束质量与前等离子体标尺长度的关系，并通过测量谐波频谱对驱动红外场载波包络相位的依赖关系，确定了产生孤立阿秒脉冲的最佳条件。(C)OSA开放获取出版协议条款下的2019年美国光学学会
Relativistic surface high harmonics have been considered a unique source for the generation of intense isolated attosecond pulses in the extreme ultra-violet and x-ray spectral ranges. Their practical realization, however, is still a challenging task and requires identification of optimum experimental conditions and parameters. Here, we present measurements and particle-in-cell simulations to determine the optimum values for the most important parameters. In particular, we investigate the dependence of harmonics efficiency, divergence, and beam quality on the pre-plasma scale length as well as identify the optimum conditions for generation of isolated attosecond pulses by measuring the dependence of the harmonics spectrum on the carrier - envelope phase of the driving infrared field. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement