ABOVE-THRESHOLD IONIZATION BY AN ELLIPTICALLY POLARIZED FIELD : QUANTUM TUNNELING INTERFERENCES AND CLASSICAL DODGING
1998
Measurements of above-threshold ionization electron spectra in an elliptically polarized field as a function of the ellipticity are presented. In the rescattering regime, electron yields quickly drop with increasing ellipticity. The yields of lower-energy electrons rise again when circular polarization is approached. A classical explanation for these effects is provided. Additional local maxima in the yields of lower-energy electrons can be interpreted as being due to interferences of electron trajectories that tunnel out at different times within one cycle of the field.
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