Threshold effects on plateau electron angular distributions in above-threshold detachment

Threshold effects on plateau electron angular distributions in above-threshold detachment

Threshold-Related Effects on the High Energy Plateau in Above-Threshold Detachment

We present results of a nonperturbative Floquet study of above-threshold detachment (ATD) of the H – and F – negative ions. Pronounced enhancements of ATD rates in the high-energy plateau region are found as the laser field intensity passes across ponderomotively shifted multiphoton thresholds. Depending on the symmetry of the initial state ( s or p symmetry), the enhancement is found to be mos...

Analytic formulas for above-threshold ionization or detachment plateau spectra

Threshold-related enhancement of the high-energy plateau in above-threshold detachment.

We present nonperturbative theoretical results showing a resonant-like enhancement of above-threshold detachment spectra in the region of the high-energy plateau as the laser intensity sweeps across channel thresholds. This enhancement has a pure quantum origin stemming from well-known threshold phenomena in multichannel problems whose features are clearly demonstrated in our numerical results....

Threshold effects in strong-field detachment of H- and F-: Plateau enhancements and angular distribution variations