A Padé expansion fitted to TDSE dipole moments enables a nonlinear oscillator model that describes nonperturbative growth in third- and fifth-harmonic generation and optical rectification up to 1.4e14 W/cm².
Brunel, Harmonic generation due to plasma effects in a gas undergoing multiphoton ionization in the high- intensity limit, J
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Nonperturbative regime of low-order harmonic generation in intense low-frequency laser field
A Padé expansion fitted to TDSE dipole moments enables a nonlinear oscillator model that describes nonperturbative growth in third- and fifth-harmonic generation and optical rectification up to 1.4e14 W/cm².