We use unique properties of primary electronic response to non-resonant optical fields to reveal topological effects in strong field dynamics of quantum matter, including topologically induced time delays in strong-field optical response.
We present the results of the first attoclock experiment using atomic hydrogen wherein the tunnelling delays under strong-field ionisation were probed with a reaction microscope and 770 nm circularly polarised ($\epsilon=0.84$) few cycle laser pulses in the intensity range of 1.65 to $3.9 \times 10^{14}$ W/cm$^2$.
We observed light-induced structures near the ionization threshold in the attosecond transient absorption spectrum in helium. By comparing to multi-level model simulations, we isolate the response of the onset of a continuum.
One of the commonly used assumptions underlying the analysis of attosecond strong-field spectroscopies is that in the propagation step any information on the initial state of the ionized electron is lost. For example, it is commonly assumed that any information on the orbital from which the electron originates is "washed out" during the propagation step, and no longer influences the...
We demonstrate an inline extreme ultraviolet interferometer based on high harmonic generation and reveal phase sensitive measurements of electronic quantum trajectory perturbations when driven by a variable elliptically polarised field.
We present new opportunities for enhancing and controlling lasing inside laser filaments. The novel, general mechanism relies on laser-dressed states in neutral atoms and uses shaped laser pulses to control their population and seed gain.
