Zara: DM: Ablation Plume HHG - An update on the TOF

Thomas: JC: High-order-harmonic generation from dense water microdroplets

http://journals.aps.org/pra/abstract/10.1103/PhysRevA.87.063811

Adam Wyatt: ARIES

Adam from RAL (ex. Oxford) will present results from our ARIES collboration.

Nacho: DM: Searching for control mechanisms over plasma composition; two-pulse femtosecond ablation approach

Zolt: DM: How to "count the number" of electrons on a molecular orbital

One of the main goals of attosecond science is to see how the electrons are "behaving" in a molecule and to have a control over the behavior.

Two-color HHG may provide a way to achieve both of the above listed aims at the same time. In N2 the energy separation of the HOMO and HOMO-1 corresponds to 1.4eV. Removing an electron from HOMO by tunnel ionization leaves an electronic hole there. Subsequently, irradiating the target with a pump beam, one may start a Rabi kind of population transfer between HOMO and HOMO-1. Depending on the excursion time of the electrons the different harmonic orders may find the HOMO orbital populated differently.

We expect that due to the population evolution of the HOMO electronic state the spectrum of the emitted harmonics will be altered.

Felicity: JC: High Harmonic Spectroscopy of the Cooper Minimum in Molecules (click to see details)

The Cooper minimum (CM) has been studied using high harmonic generation solely in atoms. Here, we present detailed experimental and theoretical studies on the CM in molecules probed by high harmonic generation using a range of near-infrared light pulses from λ=1.3 to 1.8  μm. We demonstrate the CM to occur in CS2 and CCl4 at ∼42 and ∼40  eV, respectively, by comparing the high harmonic spectra with the known partial photoionization cross sections of different molecular orbitals, confirmed by theoretical calculations of harmonic spectra. We use CM to probe electron localization in Cl-containing molecules (CCl4, CH2Cl2, and trans-C2H2Cl2) and show that the position of the minimum is influenced by the molecular environment.
Download the paper here:
http://prl.aps.org/abstract/PRL/v110/i3/e033006
or here:
http://www.phys.ksu.edu/personal/atle/Papers/Minimum_HHG_prl13.pdf

NEW WEBSITE

To make it easier for me to add events and also easier for you I will now use a new website and a google calendar. You can link individual events and the whole calendar to your own calendar.

HERE it is: https://sites.google.com/site/iclcjournalclub/home

we are back here on the original...