Recent Progress of Nonlinear Short-Pulse Tunable VUV and XUV Generation

B. Wellegehausen, K. Mossavi, H. Eichmann, B. Chichkov
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Abstract

When an intense laser is focused into a gas jet, very high-order harmonics can be produced. The harmonics are emitted approximately with the Same efficiency up to orders as high as 143 and to energies as high as 1 XO eV (6 nm). They have the same characteristics as the generating laser: they are collimated, intense, coherent and of short pulse duration. Thus, these phenomena are interesting not only from a basic point-of-view as a probe of the response of an atom to a strong laser field, but also, from a more applied point-of-view, as an interesting soft X-ray source, with specific properties. The radiation can be used in traditional applications in atomic, molecular and solid-state physics, such as lifetime measurements. More “exotic” applications, such as the production of attosecond (subfemtosecond) light pulses, have also been proposed. Both aspects, the understdndillg of the physics of harmonic generation, as well as the applications of this new XUV radiation source will be reviewed. 09:OO JFAP (Invited) Recent Progress of Nonlinear ShortPulee Tunable W V and XUV Generation
非线性短脉冲可调谐紫外及紫外发生器研究进展
当强激光聚焦到气体射流中时,可以产生非常高次的谐波。谐波的发射效率大致相同,最高可达143阶,能量高达1 XO eV (6 nm)。它们具有与产生激光相同的特性:准直、强、相干和短脉冲持续时间。因此,这些现象不仅从作为原子对强激光场响应的探针的基本观点来看是有趣的,而且从更实用的观点来看,作为具有特定性质的有趣的软x射线源。该辐射可用于原子、分子和固态物理的传统应用,例如寿命测量。更“奇特”的应用,如生产阿秒(亚飞秒)光脉冲,也被提出。从两个方面综述了对谐波产生的物理认识,以及这种新型XUV辐射源的应用。[09] JFAP(特邀)非线性短脉冲可调谐微波及XUV发电的最新进展
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