A Time-dependent study of photoelectron angular distributions due to laser-induced continuum structures
MetadataShow full item record
SubjectPhotoelectron angular distributions; Photoelectron spectroscopy; Ultraviolet spectrometry; Photoionization; Photoelectrons
The coupling of an atomic continuum to a discrete state by a strong laser field leads to so-called “laser-induced continuum structures” (LICS). In photo-ionization studies, LICS manifest themselves as autoionization-like resonances in various observable quantities. To date only very little is known about vector correlations in the region of LICS: the vast majority of publications deal with integral and angle-independent characteristics. With the advent of bright VUV and soft X-ray radiation sources (free-electron lasers, lasers based upon high-harmonic generation, and next-generation synchrotrons), experimental studies of vector correlations in the region of LICS are becoming feasible. We study the influence of LICS on the angular distribution of photo-electrons in the femtosecond time domain by solving the time-dependent Schrödinger equation directly on a space-time grid. This avoids possible restrictions due to the pulse duration and strength imposed by rotating-wave or adiabatic approximations. As a by-product of our calculations, we also gain access to the motion of the electron cloud, which allows us to visualize the dynamics of the process.
Showing items related by title, author, creator and subject.