古典蒙地卡羅方法探討強雷射與原子系統的交互作用

Classical Trajectory Monte Carlo Method Study of Atomic Dynamics under Intense Laser Pulse

楊政道(Cheng-Tao Yang)

指導教授 ： 江進福

國立交通大學/理學院/物理研究所/碩士(2009年)

https://doi.org/10.6842/NCTU.2009.00470

摘要

在這篇論文中我們利用古典蒙地卡羅方法來探討原子系統與強快速
雷射的交互作用及雷射中磁場效應的貢獻。一般原子再高強度雷射的
照射下會產生High Harmonic Generation現象。此現象在高強度快
速雷射下及考慮雷射磁場下所造成的影響，將是我們探討的問題。

關鍵字

古典蒙地卡羅方法 ； 強雷射 ； 磁場效應

並列摘要

In this thesis, we use Classical Trajectory Monte Carlo method to study the atomic dynamics under short intense pulse and magnetic effect. When an atom is exposed to an intensity laser pulse, it develops a time-dependent dipole moment and radiates a series of odd harmonics of incident laser frequency. This phenomenon of harmonic generation has been observed over wide ranges of laser intensity (e.g.10**13~10**16 w/cm**2 ). However, current laser systems can produce very short (femtoseconds) and high intensity pulses stronger than 10**17w/cm*2*2 Under such high-intensity and short time laser, the dynamics of atom and the effect of the magnetic filed component are important, and not yet well studied.

並列關鍵字

high harmonic generation ； Classical Trajectory Monte Carlo Method ； magnetic effect ； intense pulse ； femto second laser

參考文獻

[1] P. B. Corkum, "Plasma Perspective on Strong-Field Multiphoton Ionization", PRA,

[2] H. R. Reiss, "Dipole-approximation magnetic fields in strong laser beams", PRA,

63, 013409, 2000.

[3] James S. Cohen, "Comment on the classical-trajectory Monte Carlo method for

[4] J. Cooper, "Harmonic generation by a classical hydrogen atom in the presence of