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Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 46: Poster Tuesday: Plasmonics and Nanooptics

O 46.1: Poster

Dienstag, 2. April 2019, 18:00–20:00, Poster D

Multi-color holographic metasurfaces — •Bernhard Reineke1, Basudeb Sain1, Lingling Huang1,2, and Thomas Zentgraf11Universität Paderborn Department Physik, Warburger Str. 100, 33098 Paderborn — 2Beijing Institute of Technology School of Optoelectronics, Side Rd of N. 3rd Ring Rd W, Haidian Qu, Beijing Shi, China

A phase only hologram is the recording of the phase distribution of an object. This phase distribution can be used to reconstruct an image of the encoded object. Several approaches exist to encode the phase information onto a physical hologram. One way is to use specially designed silicon nanophotonic metasurfaces. Here, we use a metasurface made of silicon nanostructures that are rotated against each other to encode a phase information. In most cases, there is a certain need to extend the principles of holographic metasurfaces to a multi wavelength regime. In our work, we demonstrate a holographic Metasurface that consists of different silicon nanostructures optimized for two different wavelengths in the visible spectral range. We show how this metasurface behaves in transmission, if it is illuminated with different wavelengths from a coherent light source. Furthermore, we retrieve a color image when the metasurface is illuminated with light of different wavelengths. Our approach opens new ways for improved multi-color anticounterfeit measures or new ways of color display systems.

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