© 2026 Aqora Quantum S.A.S.

Terms Privacy Legal Notice

Chinese Physics Letters

Effect of Time-Dependent Ionization on Propagation of a Few-Cycle Circularly Polarized Laser Pulse in Two-Level Medium

Xiangyun Zhang, Zhenrong Sun, Guoliang Chen, Zugeng Wang

Published Jan 1, 2008• 5 citations

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.

DOI: 10.1088/0256-307x/25/1/031

Related papers

Effect of time-dependent ionization on the propagation of a few-cycle laser pulse in a two-level medium

宋晓红, 龚尚庆, Li Ru Xin +1 more

We investigate the influence of ionization on the propagation and spectral effects of a few-cycle ultrashort laser pulse in a two-level medium. It is found that when the fractional ionization is weak, the production of higher spectral components makes no difference. However, when the two states are essentially depleted before the peak of the laser pulse, the impact of ionization on the higher spectral components is very significant.

•Jan 1, 2005•0 citations

Effect of Time-Dependent Ionization on Propagation of a Few-Cycle Circularly Polarized Laser Pulse in Two-Level Medium

张向韵, S Rộng, 陈果良 +1 more

影响多很少周期的繁殖和光谱上的光子电离循环地(椭圆形地) 在开的二水平的媒介(二水平的正连续统模型) 的极化的激光脉搏基于 Slavcheva 和赫斯建议的传统的二水平的模型被调查(Phys。加快。一 72 (2005 ) 053804 ) ，并且任意的椭圆形地极化的激光脉搏的繁殖动力学被简化为正确、左的循环地极化的激光脉搏的。当激光紧张足够高引起电离时，有重塑的脉搏上并且在更高的顺序上的电离的重要影响光谱为二水平的模型是的户外的部件，和影响与那些不同为关上的二水平的模型。

Chinese Physics Letters•Jan 1, 2008•0 citations

Effect of time-dependent ionization on the propagation of a few-cycle laser pulse in a two-level medium

Xiaohong Song, Shangqing Gong, Ruxin Li +1 more

We investigate the influence of ionization on the propagation and spectral effects of a few-cycle ultrashort laser pulse in a two-level medium. It is found that when the fractional ionization is weak, the production of higher spectral components makes no difference. However, when the two states are essentially depleted before the peak of the laser pulse, the impact of ionization on the higher spectral components is very significant.

Physical Review A•Oct 26, 2005•9 citations

Publisher's Note: Effect of time-dependent ionization on the propagation of a few-cycle laser pulse in a two-level medium [Phys. Rev. A72, 043820 (2005)]

Xiaohong Song, Shangqing Gong, Ruxin Li +1 more

Received 2 November 2005DOI:https://doi.org/10.1103/PhysRevA.72.059904©2005 American Physical Society

Physical Review A•Nov 11, 2005•0 citations

Polarization evolution of a few-cycle ultrashort laser pulse propagating in a degenerate three-level medium

Xiaohong Song, Weifeng Yang, Shangqing Gong +2 more

The propagation of an arbitrary polarized few-cycle ultrashort laser pulse in a degenerate three-level medium is investigated by using an iterative predictor-corrector finite-difference time-domain method. It is found that the polarization evolution of the ultrashort laser pulse is dependent not only on the initial atomic coherence of the medium but also on the polarization condition of the incident laser pulse. When the initial effective area is equal to $2\ensuremath{\pi}$, complete linear-to-circular and circular-to-linear polarization conversion of few-cycle ultrashort laser pulses can be achieved due to the quantum interference effects between the two different transition paths.

Physical Review A•Sep 24, 2007•7 citations

Propagation of an arbitrary elliptically polarized few-cycle ultrashort laser pulse in resonant two-level quantum systems

Xiaohong Song, Shangqing Gong, Ruxin Li +1 more

We investigate the propagation of an arbitrary elliptically polarized few-cycle ultrashort laser pulse in resonant two-level quantum systems using an iterative predictor-corrector finite-difference time-domain method. It is shown that when the initial effective area is equal to $2\ensuremath{\pi}$, the effective area will remain invariant during the course of propagation, and a complete Rabi oscillation can be achieved. However, for an elliptically polarized few-cycle ultrashort laser pulse, polarization conversion can occur. Eventually, the laser pulse will evolve into two separate circularly polarized laser pulses with opposite helicities.

Physical Review A•Jul 28, 2006•13 citations

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.

影响多很少周期的繁殖和光谱上的光子电离循环地(椭圆形地) 在开的二水平的媒介(二水平的正连续统模型) 的极化的激光脉搏基于 Slavcheva 和赫斯建议的传统的二水平的模型被调查(Phys。加快。一 72 (2005 ) 053804 ) ，并且任意的椭圆形地极化的激光脉搏的繁殖动力学被简化为正确、左的循环地极化的激光脉搏的。当激光紧张足够高引起电离时，有重塑的脉搏上并且在更高的顺序上的电离的重要影响光谱为二水平的模型是的户外的部件，和影响与那些不同为关上的二水平的模型。

The propagation of an arbitrary polarized few-cycle ultrashort laser pulse in a degenerate three-level medium is investigated by using an iterative predictor-corrector finite-difference time-domain method. It is found that the polarization evolution of the ultrashort laser pulse is dependent not only on the initial atomic coherence of the medium but also on the polarization condition of the incident laser pulse. When the initial effective area is equal to $2\ensuremath{\pi}$, complete linear-to-circular and circular-to-linear polarization conversion of few-cycle ultrashort laser pulses can be achieved due to the quantum interference effects between the two different transition paths.

We investigate the propagation of an arbitrary elliptically polarized few-cycle ultrashort laser pulse in resonant two-level quantum systems using an iterative predictor-corrector finite-difference time-domain method. It is shown that when the initial effective area is equal to $2\ensuremath{\pi}$, the effective area will remain invariant during the course of propagation, and a complete Rabi oscillation can be achieved. However, for an elliptically polarized few-cycle ultrashort laser pulse, polarization conversion can occur. Eventually, the laser pulse will evolve into two separate circularly polarized laser pulses with opposite helicities.