Phase-change materials for programmable dielectric and plasmonic metasurfaces

Abstract

We employ Phase-Change Materials (PCMs) for local addressing of individual meta-atoms in both metallic and low-loss dielectric metasurfaces. PCMs provide a switchable dielectric environment for resonant nanostructures, altering their resonance frequencies in a non-volatile, reversible way. Specifically, we introduce a new tunable all-dielectric IR Huygens’ metasurface consisting of multi-layer Ge disk meta-units with strategically incorporated non-volatile PCM and demonstrate the optical programming with single meta-unit precision using hyperspectral measurements.[1] We also introduce a new programmable nanophotonics platform based on the next-generation “plasmonic” PCM In3Sb1Te2 (IST). [1] A. Leitis, A. Heßler, et al. Advanced Functional Materials, accepted (2020).

Authors 1

1. Thomas Taubner corresponding Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen Univ. (Germany)