Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 35: Focussed Session: Metasurfaces II

HL 35.2: Talk

Thursday, March 15, 2018, 09:45–10:00, EW 201

Multiphysics Simulation of Phase Change Material based Metasurfaces — •Sebastian Meyer and Dmitry N. Chigrin — Institute of Physics (IA) RWTH Aachen

Meta-surfaces, despite their small length scale, provide immense control over the phase, amplitude and direction of electromagnetic waves. Adding phase-change materials as an active medium promises high flexibility in designing meta-surfaces, which can be reversibly reconfigured in the post-production. Being able to accurately describe the phase change process at the individual meta-atom level is fundamental for understanding and improving functional meta-surface designs.

This presentation deals with the implementation of a self-consistent model combining electromagnetic, thermal and phase transition kinetics simulations. The model is applied to study an all-optically induced resonance shift in a perfect absorber meta-surface. The multiphysics simulations enable design optimisation leading to a significant improvement in the tunability range of the perfect absorber.