Stuttgart 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

K: Fachverband Kurzzeitphysik

K 3: Licht- und Strahlungsquellen II und deren Anwendungen

K 3.4: Vortrag

Montag, 12. März 2012, 17:30–17:45, V57.04

Efficiency of relativistic surface high harmonic generation at an optimized plasma scale length — •Jana Bierbach¹, Christian Rödel^{1, 2}, Daniel an der Brügge³, Mark Yeung⁴, Thomas Hahn⁵, Brendan Dromey⁴, Sven Herzer¹, Silvio Fuchs¹, Arpa Galestian Pour¹, Michael Behmke⁵, Mirela Cerchez⁵, Oliver Jäckel^{1, 2}, Dirk Hemmers⁵, Malte C. Kaluza^{1, 2}, Georg Pretzler⁵, Oswald Willi⁵, Alexander Pukhov³, Matthew Zepf⁴, and Gerhard G. Paulus^{1, 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.