CTAMOP publication in Optics Letters

Last updated May 30, 2017 by Andrew Brown

Attosecond Transient Absorption Spectrogram of NeonA study into the ultrafast absorption of light has broken new ground for CTAMOP researchers. Working with experimentalists at the Max-Planck Institute for Nuclear Physics in Heidelberg, Dr Andrew Brown and Prof. Hugo van der Hart have seen their work published in the pages of the prestigious, Optics Letters..

This is the first time that the intense laser matter group have collaborated directly with experiment, and one of the first examples of ab initiotheory being applied to state-of-the-art experiment.

Traditionally, the dynamics of atoms driven by strong laser fields are beyond the capability of such detailed approaches, and theoreticians have instead used simple, semiclassical models to interpret experimental results. Now, because of the increasingly sensitive spectroscopic techniques employed in experiment there is an urgent need for detailed theory which takes account of atomic structure and multi-electron effects in the dynamics of laser driven atoms in a time-dependent fashion. The RMT technique developed within CTAMOP over the last several years is now uniquely placed to take on this role, as proven by this latest publication.

An exploration of the time-dependent absorption features of neon exposed to a combination of three time-delayed laser pulses (NIR-XUV-NIR) the study elucidates the dynamical pathways along which the atom is driven on the attosecond timescale. It also represents an important experimental step towards so-called two-dimensional spectroscopy, where three laser pulses with two independently controlled time-delays are used to probe ultrafast dynamics.


About CTAMOP:

We are a Research Cluster of the School of Mathematics and Physics at Queen’s University Belfast in Northern Ireland. Our research interests are focused primarily on computational and theoretical physics.

Old Physics Building

The Old Physics Building,
where CTAMOP is situated.