Daniel Weflen

Experimental ionization of atomic hydrogen with few-cycle pulses

We present experimental data on strong-field ionization of atomic hydrogen by few-cycle laser pulses. We obtain quantitative agreement at the 10% level between the data and an ab initio simulation over a wide range of laser intensities and electron energies.

Electron-impact ionization of magnesium

A distorted-wave method as well as a hybrid approach, in which the description of the ejected-electron–residual-ion interaction is improved through a close-coupling expansion, has been applied to calculate electron-impact ionization of magnesium atoms. For comparison with currently available experimental and theoretical data for this process, we show that only a few partial waves need to be calculated by sophisticated methods, even if a large number of partial waves are required for convergence. Suggestions are made for additional experiments, which should provide even more sensitive tests of the computational models.

Above-threshold ionization in atomic hydrogen using intense, few-cycle laser pulses

We have performed the first strong-field ionization experiment in atomic hydrogen using few-cycle laser pulses. Quantitative agreement between experimental data and advanced ab initio simulations has been achieved at the 10% level.

Above-threshold ionization in atomic hydrogen using intense few-cycle laser pulses

We have performed the first strong-field ionization experiment in atomic hydrogen using few-cycle laser pulses. Quantitative agreement between experimental data and advanced ab initio simulations has been achieved at the 10% level.

Carrier-envelope phase effects in few-cycle ionisation of atomic hydrogen

We have observed carrier-envelope phase effects in the ionisation of atomic hydrogen exposed to an intense few-cycle laser pulse. Experimental data show good agreement with an advanced ab initio time dependent Schrodinger equation simulation.

Benchmarking attosecond physics with atomic hydrogen

We have performed the first experiment on the interaction of intense few-cycle laser pulses with atomic hydrogen. Experimental data is compared with an advanced ab initio simulation and agrees quantitatively with simulations at the 10% level.