PHASE-MATCHING EFFECTS IN STRONG-FIELD HARMONIC-GENERATION
PHASE-MATCHING EFFECTS IN STRONG-FIELD HARMONIC-GENERATION
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DOI：
10.1103/physreva.47.1447
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发表时间：
1993-02-01
影响因子：
2.9
通讯作者：
LHUILLIER, A
中科院分区：
文献类型：
--
作者：
BALCOU, P;LHUILLIER, A
我们提出了在1064 nm的谐波产生的实验结果，使用36 ps的掺钕钇铝石榴石激光器紧紧集中在气体射流的氙气。谐波产量的研究作为在几个激光强度的射流中的焦点的位置的函数，并作为在几个焦点位置的强度的函数。这些结果带来的信息高次谐波是如何在介质中的相位匹配，也对单原子动力学的过程。作为射流中焦点位置的函数的谐波产量表现出规则的振荡，这是由于非线性介质中谐波产生所固有的干涉效应。强度依赖性呈现出我们归因于单原子共振效应的结构。
We present experimental results of harmonic generation at 1064 nm using a 36-ps neodymium-doped yttrium aluminum garnet laser tightly focused in a gas jet of xenon. The harmonic yields are studied as a function of the position of the focus in the jet at several laser intensities and as a function of intensity at several focus positions. These results bring information about how the high harmonics are phase matched in the medium and also about the single-atom dynamics of the process. The harmonic yields as a function of the position of the focus in the jet exhibit regular oscillations that are due to the interference effects inherent to the generation of harmonics in the nonlinear medium. The intensity dependences present structures that we attribute to single-atom resonance effects.