Berlin 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
K: Fachverband Kurzzeitphysik
K 7: Poster
K 7.3: Poster
Mittwoch, 19. März 2014, 16:30–18:30, SPA Foyer
Broadband XUV-Polarimetry of High Harmonics from Plasma Surfaces by multiple Fresnel Reflections — •Thomas Hahn1, Jana Bierbach2,3, Christian Rödel2,3, Dirk Hemmers1, Mark Yeung3,4, Brendan Dromey4, Silvio Fuchs2,3, Arpa Galestian Pour2, Stephan Kuschel2,3, Matt Zepf3,4, Gerhard Paulus2,3, and Georg Pretzler1 — 1Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität Düsseldorf — 2Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena — 3Helmholtz-Institut Jena — 4Centre for Plasma Physics, School of Mathmatics and Physics, Queen's University Belfast, United Kingdom
High harmonic generation (HHG) from the nonlinear interaction of intense laser pulses with gases or plasma surfaces is the most prominent way of creating coherent extreme ultraviolet (EUV/XUV) pulses. The measurement and control of the polarization may become important in future applications. We present an broadband XUV polarimeter based on multiple Fresnel reflections providing an extinction rate of 5 to 25 for 17-45 nm that has been tested at a gas harmonic source. In a further experiment using HHG from plasma surfaces the XUV polarimeter allowed a polarization measurement of high harmonic radiation from plasma surfaces for the first time which reveals a linear polarization state as predicted for our generation parameters. The generation and control of intense polarized XUV pulses - together with the availability of broadband polarizers in the XUV - open the way for a series of new experiments.