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  • 2013 Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
  • (Optica Publishing Group, 2013),
  • paper CG_7_6

The role of the Kramers-Henneberger atom in the higher-order Kerr effect

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Abstract

Even moderate laser fields with intensities of about 1013 W/cm2, standard in many ultrafast experiments, suppress the potential barrier for ionization for all excited states in most atoms and molecules. By means of angle resolved photoelectron spectra, we have shown [1] that in this regime the formation of stable “laser-dressed” atoms, the so-called Kramers-Henneberger (KH) atoms [2], plays a crucial role. The response of the “almost-free” states of this atom does not only play a key role in the experimental surprise of the unprecedented acceleration of neutral atoms [3] at the rate of 1015 m/sec2 in intense infrared (IR) laser pulses, but it can also affect the complex process of filamentation of ultrashort IR femtosecond laser pulses in air [4].

© 2013 IEEE

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