Laser effects in photoionization: numerical solution of coupled equations for a three-dimensional Coulomb potential

Abstract

The time-dependent Schrödinger equation was solved numerically as a set of coupled equations for an electron moving in three spatial dimensions, bound initially (t ≤ 0) by a Coulomb potential, and acted on by a linearly polarized, single-frequency, classical electromagnetic field that is turned on abruptly at t = 0. The laser field was assumed to be spatially homogeneous, and magnetic interactions between the laser beam and the electron were ignored. Characteristic photoionization times were determined for a wide range of scaled laser intensities and scaled laser frequencies and for a range of electron initial-state quantum numbers nlm. Results are compared with those obtained previously [ Phys. Rev. A 40, 683 ( 1989)] for a one-dimensional δ potential.

© 1990 Optical Society of America

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