Wavelength dependence of high-harmonic generation from ultrashort pulses
Wavelength dependence of high-harmonic generation from ultrashort pulses
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DOI：
10.1080/09500340802130787
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发表时间：
2008-01-01
影响因子：
1.3
通讯作者：
Burgdoerfer, J.
中科院分区：
文献类型：
--
作者：
Schiessl, K.;Ishikawa, K. L.;Burgdoerfer, J.
我们研究了高次谐波产生（HHG）引起的辐射强度与几个周期驱动场波长的关系。叠加在一个光滑的幂律依赖先前观察到的，强烈和快速的波动上的精细尺度观察。这些波动的起源可以根据量子路径干涉来确定，其中有几个轨道有显著的贡献。分析了驱动器的脉冲形状和脉冲长度的依赖关系。我们讨论了众所周知的通道关闭效应的关系，重点是超短脉冲持续时间的影响。
We investigate the dependence of the intensity of radiation due to high-harmonic generation (HHG) as a function of the wavelength of a few-cycle driver field. Superimposed on a smooth power-law dependence observed previously, strong and rapid fluctuations on a fine scale are observed. The origin of these fluctuations can be identified in terms of quantum path interferences with several orbits significantly contributing. The dependence on the pulse shape and pulse length of the driver is analyzed. We discuss the relation to well-known channel closing effects with emphasis on effects of the ultrashort duration of the pulse.