Electron dynamics in Na4 clusters under femtosecond laser irradiation

Electron dynamics in Na4 clusters under femtosecond laser irradiation
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飞秒激光照射下 Na4 团簇中的电子动力学

DOI:
10.1088/1054-660x/23/3/036004
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发表时间:
2013-03
期刊:
影响因子:
1.2
通讯作者:
Bingcong Gou
Bingcong Gou
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Xuhai Hong;Feng Wang;Wenyong Su;Yalong Jiao;Nana Sun;Bingcong Gou

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飞秒激光辐照下金属团簇中的电子动力学在激光参数的控制下会产生激发的非线性现象。在这项研究中,金属团簇Na 4的飞秒激光照射下的例子已被观察到的含时密度泛函理论分子动力学(TDDFT-MD)的框架内,自洽耦合的量子力学TDDFT处理的价电子与经典的分子动力学描述的离子核心。选择特定的激发频率和偏振方向的激光已经研究的偶极响应和电离过程的行为。我们发现有必要通过匹配激光频率和偏振方向来探索金属团簇的电子动力学。此外,适当的激光参数诱导的共振偶极振荡显示出明显的增强电离行为。
The electron dynamics in metal clusters under femtosecond laser irradiation yield excited nonlinear phenomena under the control of laser parameters. In this study, metal clusters Na4 as an example under femtosecond laser irradiation have been observed within the framework of time-dependent density functional theory molecular dynamics (TDDFT-MD), which self-consistently couples a quantum-mechanical TDDFT treatment of valence electrons with a classical molecular dynamics description of ionic cores. The specific excitation frequencies and polarization directions of the laser have been chosen to investigate the behavior of the dipole response and ionization process. We found that it is necessary to explore the electron dynamics of metal clusters by matching the laser frequency and polarization direction. In addition, resonant dipole oscillations induced by suitable laser parameters show pronounced enhancement of the ionization behavior.
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