Title: Multiphoton Assisted Recombination: Beyond the Simpleman's Model

E.S. Shuman, R.R. Jones, and T.F. Gallagher

Abstract:

We have observed multiphoton assisted recombination in the presence of a 38.8 GHz microwave field. Stimulated emission of up to ten microwave photons results in energy transfer from continuum electrons, enabling recombination. The maximum electron energy loss is far greater than the 2$U_{p}$ predicted by the standard ``Simpleman's" model. The data are well-reproduced by both an approximate analytic expression and numerical simulations in which the combined Coulomb and radiation fields are taken into account.

Status: Physical Review Letters 101, 263001 (2008).