Effect of Time-Dependent Ionization on Propagation of a Few-Cycle Circularly Polarized Laser Pulse in Two-Level Medium
ZHANG Xiang-Yun, SUN Zhen-Rong, CHEN Guo-Liang, WANG Zu-Geng
State Key Laboratory of Precision Spectroscopy, and Department of Physics, and Department of Mathematics, East China Normal University, Shanghai 200062
Effect of Time-Dependent Ionization on Propagation of a Few-Cycle Circularly Polarized Laser Pulse in Two-Level Medium
State Key Laboratory of Precision Spectroscopy, and Department of Physics, and Department of Mathematics, East China Normal University, Shanghai 200062
摘要Influence of multiphoton ionization on the propagation and spectrum of few-cycle circularly (elliptically) polarized laser pulses in an open two-level medium (two-level plus continuum model) is investigated based on the conventional two-level model proposed by Slavcheva and Hess (Phys. Rev. A 72 (2005) 053804), and the propagation dynamics of an arbitrary elliptically polarized laser pulse is reduced into that of right and left circularly polarized laser pulses. When the laser intensity is high enough to cause ionization, there are significant impacts of ionization on the pulse reshaping and on the higher order spectral components, and the impacts for the open two-level model are different from those for the closed two-level model.
Abstract：Influence of multiphoton ionization on the propagation and spectrum of few-cycle circularly (elliptically) polarized laser pulses in an open two-level medium (two-level plus continuum model) is investigated based on the conventional two-level model proposed by Slavcheva and Hess (Phys. Rev. A 72 (2005) 053804), and the propagation dynamics of an arbitrary elliptically polarized laser pulse is reduced into that of right and left circularly polarized laser pulses. When the laser intensity is high enough to cause ionization, there are significant impacts of ionization on the pulse reshaping and on the higher order spectral components, and the impacts for the open two-level model are different from those for the closed two-level model.
(Frequency conversion; harmonic generation, including higher-order harmonic generation)
引用本文:
ZHANG Xiang-Yun;SUN Zhen-Rong;CHEN Guo-Liang;WANG Zu-Geng. Effect of Time-Dependent Ionization on Propagation of a Few-Cycle Circularly Polarized Laser Pulse in Two-Level Medium[J]. 中国物理快报, 2008, 25(1): 112-115.
ZHANG Xiang-Yun, SUN Zhen-Rong, CHEN Guo-Liang, WANG Zu-Geng. Effect of Time-Dependent Ionization on Propagation of a Few-Cycle Circularly Polarized Laser Pulse in Two-Level Medium. Chin. Phys. Lett., 2008, 25(1): 112-115.
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2008, Vol. 25 
