In the long-wavelength limit, above-threshold ionization (ATI) is primarily the result of the interaction of a newly freed electron with the laser field. Classical physics requires that linearly and circularly polarized light produce very different ATI spectra. Measurements performed using both linearly and circularly polarized, picosecond, 10-\ensuremath{\mu}m pulses confirm these conclusions.
This is the first high resolution measurement of the electron energy spectrum from high intensity above-threshold ionization (pondermotive energy \ensuremath{\gg} ionization pot...
The approximation method introduced by Keldysh is revised and extended. The technique is applicable to the photodetachment by a plane-wave field of an electron bound by a short-...
Studies of multiphoton ionization of noble gases have been carried out using 1-\ensuremath{\mu}m, 1-ps laser pulses with intensities up to the mid- ${10}^{16}$ W/${\mathrm{cm}}^...
During strong-field multiphoton ionization, a wave packet is formed each time the laser field passes its maximum value. Within the first laser period after ionization there is a...
The theoretical description of the nonlinear photoionization of atoms and ions exposed to high-intensity laser radiation is underlain by the Keldysh theory proposed in 1964. The...
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