Berlin 2015 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 36: Poster Session I
DS 36.96: Poster
Donnerstag, 19. März 2015, 09:30–12:00, Poster A
Towards high spatial and temporal resolution of attosecond XUV pulse by fractal multilevel zone plate — •Huaihai Pan1,2,3, Christian Späth1,3, Alexander Guggenmos1,3, SooHoon Chew1,3, Jürgen Schmidt1,3, Quanzhong Zhao2, and Ulf Kleineberg1,3 — 1Ludwig-Maximilians-Universität München, Fakultät für Physik, Am Coulombwall 1, 85748 Garching, Germany — 2State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, ChineseAcademy of Sciences, Shanghai 201800, China — 3Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
Multilevel zone plate has been proposed to improve the diffraction efficiency at first diffraction order. Here, we report the theoretical simulation of chirped-pulses diffracted by multilevel zone plate that only consists of outermost successive 10 one-wave zones with other inner zones blocked. This kind of multilevel zone plate is divided into 4 levels for each one-wave zone, every level of which has a certain amount of phase shift for the given wavelength. Molybdenum is chosen to electroplate zone plate and Gaussian pulse centered at 92.02 eV with full bandwidth of approximately 76 ~ 140 eV is employed. This design does not only improve the diffraction efficiency that reach to 56.5% for the effective incident light illuminated on multilevel zone plate but also increase the spatial resolution as well as preserve the temporal structure of focused attosecond pulse at first diffraction order for the first time.