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Enhanced THz third-harmonic generation in graphene via hot-carriers in a topological cavity
Spyros Doukas (Department of Physics, National and Kapodistrian University of Athens, Athens, Greece), Ioannis Katsantonis (Department of Physics, National and Kapodistrian University of Athens, Athens, Greece, Foundation of Research and Technology Hellas, Institute of Electronic Structure and Laser, 71110, Heraklion, Greece), Thomas Koschny (Ames National Laboratory and Department of Physics an…

Enhanced THz third-harmonic generation in graphene via hot-carriers in a topological cavity
Graphene is a promising material for nonlinear THz applications owing to its high third-order susceptibility and tunable optical properties. Its strong nonlinear response, driven by free-carrier thermodynamics, facilitates efficient third-harmonic generation (THG), which can be further enhanced using resonant metasurfaces and plasmonic structures. In this study, we use a platform that integrates graphene ribbons at the interface of topological photonic crystals designed to boost THG at low THz …