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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 8, Iss. 3 — Mar. 1, 2010
  • pp: 338–341

Experimental study on multiphoton ionization of Ar with high intensity short laser pulses

Xiaoyin Zhang, Wei Quan, Yang Wang, Huipeng Kang, Hongping Liu, and Xiaojun Liu  »View Author Affiliations

Chinese Optics Letters, Vol. 8, Issue 3, pp. 338-341 (2010)

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We present high resolution photoelectron energy spectra from multiphoton ionization (MPI) of Ar subject to laser pulses with wavelength of 400 nm, pulse duration of 35 fs, and maximum intensity of 51013 W/cm2. Ionizations into Ar+ 2P3/2 and 2P1/2 channels are observed and distinct resonance structures are found in both ionization channels. The intensity dependence of the resonance structures is explained in terms of the mechanism of Freeman resonance, i.e., transient resonances of alternating current (AC) Stark-shifted Rydberg states at specific intensities within the laser pulse.

© 2010 Chinese Optics Letters

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(020.5780) Atomic and molecular physics : Rydberg states
(300.6350) Spectroscopy : Spectroscopy, ionization

Xiaoyin Zhang, Wei Quan, Yang Wang, Huipeng Kang, Hongping Liu, and Xiaojun Liu, "Experimental study on multiphoton ionization of Ar with high intensity short laser pulses," Chin. Opt. Lett. 8, 338-341 (2010)

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