Coulomb focusing in resonant production of super-ponderomotive photo-electrons from helium.
We present wave functions of helium atoms exposed to an intense 800-nm laser, calculated by numerical integration of the time-dependent Schrodinger equation. Around 600 TW/cm2 strong resonance enhancements of high-energy electrons occur, each leading to the appearance of specific quasi-periodic charge distribution patterns around the atom. The time-dependence of several such states is presented and discussed.
Muller
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