Stuttgart 2012 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
K: Fachverband Kurzzeitphysik
K 3: Licht- und Strahlungsquellen II und deren Anwendungen
K 3.4: Talk
Monday, March 12, 2012, 17:30–17:45, V57.04
Efficiency of relativistic surface high harmonic generation at an optimized plasma scale length — •Jana Bierbach1, Christian Rödel1, 2, Daniel an der Brügge3, Mark Yeung4, Thomas Hahn5, Brendan Dromey4, Sven Herzer1, Silvio Fuchs1, Arpa Galestian Pour1, Michael Behmke5, Mirela Cerchez5, Oliver Jäckel1, 2, Dirk Hemmers5, Malte C. Kaluza1, 2, Georg Pretzler5, Oswald Willi5, Alexander Pukhov3, Matthew Zepf4, and Gerhard G. Paulus1, 2 — 1Institut für Optik und Quantenelektronik, Jena, Germany — 2Helmholtz-Institut Jena, Germany — 3Institut für Theoretische Physik, Düsseldorf, Germany — 4Centre for Plasma Physics, Belfast, UK — 5Institut für Laser- und Plasmaphysik, Düsseldorf, Germany
We report on the efficiency of relativistic surface high harmonic generation(SHHG) that is measured in experiments and compare it to the established theory and to numerical simulations. A strong influence of the plasma scale length on the efficiency was found, which can be controlled by an adequate enhancement of the laser pulse contrast using a plasma mirror or second harmonic generation.This is explained theoretically by making the transition from a sharp plasma edge to an expanded density distribution with a finite plasma scale length. Notwithstanding that the harmonic emission is enhanced using an optimized scale length, the measured efficiency is below the expectations. We record XUV pulse energies in the µJ range and efficiencies of ≈10−6. Hence, relativistic SHHG has been realized at a repetition rate of 10 Hz for the first time.