Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 10: Bioinspired Functional Materials II

CPP 10.10: Vortrag

Montag, 20. März 2017, 17:30–17:45, ZEU 114

Bio-inspired photonic structures as blueprints for compact polarization converters — •Xia Wu1, Fernando Luis Rodríguez Gallegos2, Marie-Christin Angermann3, Bertram Schwind1, Helge-Otto Fabritius4, Georg von Freymann3, and Jens Förstner21Department of Chemistry, University of Paderborn, Warburger Straße 100, D-33098, Paderborn, Germany — 2Theoretical Electrical Engineering, University of Paderborn, Warburger Straße 100, 33098 Paderborn, Germany — 3Physics Department, University of Kaiserslautern, Erwin-Schroedinger-Strasse, 67663 Kaiserslautern, Germany — 4Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany

Polarization conversion is often needed in many optical applications. In nature, many species of insects have evolved photonic structures can convert the polarization state of light upon reflection[1,2]. We reveal a new type of biological polarization converter found in the scales of weevil Entimus imperialis. We show that the D-structures in (and only in) the green domains of scales (i.e. {001} lattice plane parallel to scale surface) can act as a linear polarization converter. Furthermore we show that the D-structures in green domains preserve the handedness of the incident circularly polarized light upon reflection. Inspired by this finding, we synthesized woodpile structures by direct laser writing. We show that the well-known woodpile structure has very similar polarization conversion effect like that of D-structure. References: [1] K. Zhang et al., RSC Adv. (2014) 4, 51865-51871 [2] P. Vukusic et al., Nature (2000) 404, 457

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