The dynamics of an electron wave packet in the presence of laser radiation and of a one-dimensionalrepulsive soft-core potential is investigated. For different laser intensities and for different initial positions ofthe electron wave packet, these results are compared with those for an attractive potential. The repulsivepotential is capable of confining the electron quite efficiently under appropriate conditions. In these conditions,the electron is shown to emit a high harmonic spectrum similar to that emitted by the more conventionalattractive potential. It is thus argued that recombination into an atomic bound state as required by the three stepmodel is not essential for the emission of high harmonics.
|Numero di pagine||8|
|Rivista||PHYSICAL REVIEW A|
|Stato di pubblicazione||Published - 2003|
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