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

DM: guest: Miron Amusia: Effect of electron exchange on atomic ionization in a strong electric field

Specific properties of Hartree-Fock equations due to exchange and non-linearity are considered. Particular attention is given to an atom in a strong electric static field. It is demonstrated that exchange between outer and inner electrons, taken into account by the so-called Fock term affects strongly the long-range behavior of the inner electron wave function. As a result, it dramatically increases its probability to be ionized.
A simple model is analyzed demonstrating that the decay probability, compared to the case of a local (Hartree) atomic potential, increases by many orders of magnitude. As a result of such increase, the ratio of inner to outer electrons ionization probability became not too small.
It is essential that the effect of exchange upon probability of inner electron ionization by strong electric field is proportional to the square of the number of outer electrons. It signals that in clusters of fullerenes the inner electron ionization by strong field, the very fact of which is manifested by e.g. high energy quanta emission, has to be essentially increased as compared to this process in gaseous atomic objects.

JC: Stefan: Highly radiative shock experiments driven by GEKKO XII

In this paper, recent results obtained on highly radiative shocks generated in a xenon .lled gas cell using the GEKKO XII laser facility are presented. Data show extremely high shock velocity (.150 km/s) never achieved before in gas. Preliminary analyses based on theoretical dimensionless numbers and numerical simulations suggest that these radiative shocks reach a new radiative regime where the radiative pressure plays a role in the dynamics and structure of the shock. A major effect observed is a strong anisotropic emission in the downstream gas. This unexpected feature is discussed and compared to available 2D radiation hydrodynamic simulations.
http://www.springerlink.com/content/n152166384177217/
material...