| Original Articles |
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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 |
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| Cite this article: |
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ZHANG Xiang-Yun, SUN Zhen-Rong, CHEN Guo-Liang et al 2008 Chin. Phys. Lett. 25 112-115 |
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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.
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| Keywords:
42.50.Ct
42.50.Md
42.50.Gy
42.50.Nn
42.65.Ky
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Received: 20 April 2007
Published: 27 December 2007
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| PACS: |
42.50.Ct
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(Quantum description of interaction of light and matter; related experiments)
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42.50.Md
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(Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency)
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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42.50.Nn
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(Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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