Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 65: Nano-Optics IV
Q 65.1: Talk
Friday, March 27, 2015, 11:00–11:15, C/HSO
Waveguiding and polarization control of extreme-ultraviolet radiation — •Sergey Zayko1, Murat Sivis1, Sascha Schäfer1, Tim Salditt2, and Claus Ropers1 — 1IV. Physical Institute, University of Göttingen, 37077 Göttingen, Germany — 2Institute for X-Ray Physics, University of Göttingen, 37077 Göttingen, Germany
Coherent diffractive imaging (CDI) at extreme-ultraviolet (EUV) frequencies allows for the investigation of field distributions in nanoscale structures [1]. Here, we study the propagation of EUV light in extended metallic slit-waveguides by means of CDI, utilizing a high-harmonic generation source. In particular, the field distribution at the exit aperture of the waveguides is reconstructed from the far-field diffraction pattern using an iterative phase retrieval algorithm. The exit wave is governed by multiple scattering within the depth of the metal slit, and we find pronounced waveguiding with a significant polarization contrast. Our experimental results show good agreement with semi-analytical and numerical simulations and will allow for new optical elements such as mode filters, polarizers and waveplates for EUV and soft-X-ray radiation.