Search

We experimentally achieve two-dimensional CEP-control of bond breaking in H2 dissociation with elliptically polarized pulses. The lab and molecular frame of reference proton ejection asymmetries are compared.

We report kinematically complete measurements of frustrated double ionization of argon atoms with a reaction microscope. Experimental results show much higher electron trapping probability during the strong-field double ionization than that during the single ionization.

We experimentally investigated a delayed fragmentation of hydrocarbon molecules on nanosecond to microsecond timescale after double ionization by femtosecond laser pulses. Quantum chemical simulations suggest that it originates from meta-stable high-lying vibrational states of dications.

Single and double electron recapture processes into Rydberg states driven by few-cycle laser pulses are studied for argon dimers. The electron emission and recapture dynamics show a strong dependence on the pulses’ carrier-envelope phase.

We demonstrated coincidence detection of high-lying Rydberg states populated in strong field interaction. Simulations reveals the measured ionization signal of Rydberg states originates from DC field induced tunneling ionization and photoionization by blackbody radiation.

Using a double-pulse scheme we visualize and control molecular dynamics taking place on intermediately populated states during different sequential double ionization pathways of CO2. Exchanging the pulse-sequence can almost completely switch the pathway.

The dynamics of sequential two-electron emission from helium is extracted from measured momentum distributions. Emission in between the field-maxima and on sub-laser-cycle times is identified. The corresponding structures are roughly reproduced by a semi-classical model.

We experimentally demonstrated control of chemical bond break of ethylene in intense laser fields with employing both electronic dynamics and nuclear vibrational dynamics.

We experimentally and theoretically investigated the applications of attosecond electron wave packets on probing ultrafast electron dynamics of atoms and controlling electron recollision induced double ionization of atoms and fragmentation of hydrocarbon molecules.

Multiparticle coincidence imaging reveals laser-driven ejection of energetic protons via concerted Coulomb explosions from unexpectedly high molecular charge states. The underlying mechanism is studied with laser pulses from 4.5 to 27 fs in duration.

We demonstrate self-referenced wavefunction retrieval of a valence electron wavepacket during its creation by strong-field ionization with a sub-10-attosecond precision, based on a distinct separation of interferences arising at different time-scales.

We manipulate the trajectories of field-ionizing electron wave packets using two-color laser pulses for controlling the Coulomb potential's influence on their three-dimensional momentum distributions.

Using multi-particle coincidence detection we are able to show that carbon-hydrogen molecules exposed to moderate laser-intensities can completely disintegrate from high charge states by a concerted emission of all protons with high kinetic energies.

Using coincidence momentum spectroscopy we show that the external laser field’s properties driving the internal molecular dynamics have negligible influence on the decision to follow a given fragmentation pathway in three-body fragmentation of polyatomic molecules.