DM: Suren: Attosecond cascades and time-delays in one-electron photo-ionization

I shall present time-resolved ab-initio study of the attosecond dynamics of electron-electron correlation during single-electron, single XUV-photon ionization of an excited two-electron atom. Specifically, we aim to time-resolve the two fundamental processes that play the key role in electronic excitations of the ion created by ionization: the shake-up and the post-ionization interaction of the outgoing electron with the core (knock-up). These two processes have different time characteristics: while the shake-up is an essentially instantaneous process, the knock-up excitation due to the interaction between the ionic and the continuum electrons depends on the movement of the latter and may be significant for longer times, leading to delays in the ionization process. We observe an interplay of the initial shake-up excitation with the excitation cascades induced by the post-ionization interaction of the outgoing electron with the core. The time-scales and the structure of these excitation cascades is directly linked to the time it takes the 'active' continuum electron, lifted from a deeper bound orbital, to traverse the orbit of the 'passive' electron residing in the outer orbit. Ideas for resolving and controlling the two-electron interaction dynamics during the ionization process will be discussed.

JC: Stefan: A study of ambient upstream material properties using perpendicular laser driven radiative blast waves in atomic cluster gases

http://charles.qols.ph.ic.ac.uk/~twitting/consJCDM/material/20111122_JC_Stefan_blast/

DM: Chris Pricey: Optical Trapping

Will discuss what we have been doing in the lab, and what we plan to do.

JC: Tobi: Plasmonic generation of ultrashort extreme-ultraviolet light pulses

I will discuss another production from Kim:

"Plasmonic generation of ultrashort extreme-ultraviolet light pulses"

http://www.nature.com/nphoton/journal/v5/n11/full/nphoton.2011.258.html

The authors build on previous work "High-harmonic generation by resonant plasmon field enhancement"

http://www.nature.com/nature/journal/v453/n7196/full/nature07012.html

and now show high harmonic emission from something like a SNOM tip.

 

DM: guest: Louis Di Mauro: Wavelength scaling of strong-field Physics

DM: Vitali:

DM: Bridgette: Laser-Enabled Auger Decay in Rare-gas Atoms

http://prl.aps.org/abstract/PRL/v106/i5/e053002