NONLINEAR EFFECTS IN ELECTRON AND PHOTON EMISSION FROM ATOMS IN INTENSE LASER FIELDS

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Abstract
Atoms subject to intense laser fields are capable of absorbing many more photons than the minimum number needed to ionize. This leads to two striking nonlinear phenomena, above-threshold ionization, and high-order harmonic generation. We have used time-dependent methods to calculate both these processes nonperturbatively for realistic, three-dimensional atoms. This allows us to clarify the relationships between photon and electron emission rates in the strong field regime.

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