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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 Bierbach^2,3, Christian Rödel^2,3, Dirk Hemmers¹, Mark Yeung^3,4, Brendan Dromey⁴, Silvio Fuchs^2,3, Arpa Galestian Pour², Stephan Kuschel^2,3, Matt Zepf^3,4, Gerhard Paulus^2,3, 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.