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

Experimental study on multiphoton ionization of Ar with high intensity short laser pulses
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摘要 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 5×10^13 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. 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 5×10^13 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.
出处 《Chinese Optics Letters》 SCIE EI CAS CSCD 2010年第3期338-341,共4页 中国光学快报(英文版)
基金 supported by the National Natural Science Foundation of China(No.10674153) the Natural Science Foundation of Hubei Province (No.2008CDB007)
关键词 Laser pulses Particle detectors Photoelectron spectroscopy PHOTOIONIZATION RESONANCE SPECTROSCOPY Laser pulses Particle detectors Photoelectron spectroscopy Photoionization Resonance Spectroscopy
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