Today it is possible to engineer the building blocks of artificial materials (meta-materials) with feature sizes smaller than the wavelength of light. The ability to design meta-atoms in a largely arbitrary fashion adds a new degree of freedom in material engineering, allowing to create artificial materials with unusual electromagnetic properties rare or absent in nature. Achieving tunable, switchable and non-linear functionalities of meta-materials at individual meta-atom level could potentially lead to additional flexibility in designing active photonic devices. These include among others, meta-materials based on phase-change materials, whose properties could be altered by thermal or photo-thermal means. In this presentation, our recent results on developing appropriate numerical methods to study hybrid meta-material structures containing phase-change materials will be discussed. Meta-atoms based on plasmon polaritonic materials are considered. We develop appropriate phenomenological models of phase transition and self-consistently couple them with the full wave electromagnetic and heat transfer solvers. Developed methods are used to design meta-surface based tunable components. We demonstrate an importance of the multiphysical modelling and discuss deficiencies of the commonly used purely electromagnetic simulations approaches.
Sebastian Meyer and Dmitry N. Chigrin, "Design of reconfigurable meta-surfaces: modeling done right (Conference Presentation)," Proc. SPIE 10721, Active Photonic Platforms X, 107211W (Presented at SPIE Nanoscience + Engineering: August 23, 2018; Published: 17 September 2018); https://doi.org/10.1117/12.2321120.5836038578001.
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