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Shortwavelength Radiation Produced by Strong Field Harmonic Generation

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Abstract

Single–atom harmonic generation spectra fall off at an energy equal to the ionization energy plus about three times the oscillation energy of a free electron in the field [1]. We have explored experimentally this cutoff law using a short pulse Ti: Sapphire laser. We show how this law is modified by the effect of propagation in the nonlinear medium. Moreover, the generation of high order harmonics from Xe+ and Ar+ ions is demonstrated.

© 1993 Optical Society of America

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