Strong field effects in above-threshold detachment of a model negative ion

A one-dimensional delta-function potential model is employed and its corres- ponding time-dependent SchrBdinger equation is solved exactly in momentum representa- tion. Several strong field effects of above-threshold detachment of a model H- ion arc explored, including an interesting temporal leakage in the below-shifted-threshold regime, non-linear dynamics of the system, and high-order harmonic generation, as well as the intensity effect of a second law-frequency laser field.