Attosecond pulse carrier-envelope phase effects on ionized electron momentum and energy distributions: roles of frequency, intensity and an additional IR pulse
Attosecond pulse carrier-envelope phase effects on ionized electron momentum and energy distributions: roles of frequency, intensity and an additional IR pulse
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阿秒脉冲载波包络相位对电离电子动量和能量分布的影响：频率、强度和附加红外脉冲的作用
DOI：
10.1088/1367-2630/10/2/025030
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发表时间：
2007-10
影响因子：
3.3
通讯作者：
Starace, Anthony F.
中科院分区：
文献类型：
--
作者：
Pronin, Evgeny A.;Peng, Liang-You;Starace, Anthony F.
分析了在有和没有附加几个周期的红外脉冲的情况下，几个周期的阿秒脉冲的载波包络相位（CEP）对电离电子动量和能谱的影响。在没有IR脉冲的情况下，CEP引起的电离电子动量分布的不对称性示出为阿秒脉冲强度的3/2幂而变化。这些不对称性也被发现，以满足一个近似的比例律涉及的频率和强度的阿秒脉冲。即使在非常弱的红外脉冲（强度为1011-1012 W cm−2）的情况下，阿秒脉冲CEP引起的电离电子动量分布的不对称性也会显著增加。此外，对于更高的IR激光强度，我们观察到低电子能量峰分离的IR光子能量在一个电子动量方向沿着激光偏振轴，在相反的方向，我们发现结构化的峰，间隔的两倍的IR光子能量。提出了电离电子动量分布中这种不对称低能结构的可能物理机制。我们的结果是基于三维的，含时薛定谔方程的单活性电子的解决方案，包括适用于H和He原子的原子势。
The effects of the carrier-envelope phase (CEP) of a few-cycle attosecond pulse on ionized electron momentum and energy spectra are analyzed, both with and without an additional few-cycle IR pulse. In the absence of an IR pulse, the CEP-induced asymmetries in the ionized electron momentum distributions are shown to vary as the 3/2 power of the attosecond pulse intensity. These asymmetries are also found to satisfy an approximate scaling law involving the frequency and intensity of the attosecond pulse. In the presence of even a very weak IR pulse (having an intensity of the order of 1011–1012 W cm−2), the attosecond pulse CEP-induced asymmetries in the ionized electron momentum distributions are found to be significantly augmented. In addition, for higher IR laser intensities, we observe for low electron energies peaks separated by the IR photon energy in one electron momentum direction along the laser polarization axis; in the opposite direction, we find structured peaks that are spaced by twice the IR photon energy. Possible physical mechanisms for such asymmetric, low-energy structures in the ionized electron momentum distribution are proposed. Our results are based on single-active-electron solutions of the three-dimensional, time-dependent Schrödinger equation including atomic potentials appropriate for the H and He atoms.
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影响因子：
8.6
作者：
F. Quéré;J. Itatani;G. Yudin;P. Corkum
通讯作者：
F. Quéré;J. Itatani;G. Yudin;P. Corkum
影响因子：
1.3
作者：
G. G. Paulus-G.;F. Lindner;H. Walther;A. Baltuska;E. Goulielmakis;M. Lezius;F. Krausz
通讯作者：
G. G. Paulus-G.;F. Lindner;H. Walther;A. Baltuska;E. Goulielmakis;M. Lezius;F. Krausz
影响因子：
8.6
作者：
A. Bandrauk;S. Chelkowski;N. Shon
通讯作者：
A. Bandrauk;S. Chelkowski;N. Shon
影响因子：
64.8
作者：
Paulus, GG;Grasbon, F;De Silvestri, S
通讯作者：
De Silvestri, S
影响因子：
2.9
作者：
Mairesse, Y;Quéré, F
通讯作者：
Quéré, F