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O: Fachverband Oberflächenphysik
O 33: Poster Session - Plasmonics and Nanooptics: Applications and other Aspects
O 33.8: Poster
Montag, 16. März 2020, 18:15–20:00, P1C
Large-scale optical programming of phase-change material metasurfaces — •Laric Bobzien, Andreas Heßler, Julian Hanss, Thomas Kalix, Matthias Wuttig, and Thomas Taubner — Institute of Physics (IA), RWTH Aachen
Metasurfaces have the ability to arbitrarily manipulate light with the help of subwavelength, periodically arranged, scatterers. Functionalities like beam steering, lensing and holography have been realized. However, once fabricated, metasurfaces remain passive, i.e. they have one fixed functionality. They can be rendered active and programmable by including active materials like phase-change materials (PCMs) [1] which have large optical contrast between their metastable crystalline and amorphous phases.
A home-built setup for optical switching of PCMs was prevously applied to great success for reversible switching of ultra-confined surface phonon polariton resonators [2], advanced optical programming of individual antennas in metallic metasurfaces [3] and all-dielectric Huygens’ metasurfaces [4]. So far, this setup has however been limited to small-scale programming of 20x20 µm2. Here, we present our work on re-designing the switching setup for larger-scale optical programming. In the future, we hope to apply the improved setup to realize advanced functionalities like switching between holographic images.
[1] M. Wuttig et al., Nature Photonics 11, 465-476 (2017)
[2] P. Li et al., Nature Materials 15, 870-875 (2016)
[3] A.-K. U. Michel et al., Advanced Materials 31, 1901033 (2019)
[4] A. Leitis et al. submitted to Advanced Functional Materials