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Mid-Infrared Metasurface Based on a Phase-Change Material for Enhanced Third-Harmonic Generation

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Abstract

We report on the nonlinear optical properties of the phase change material Ge2Sb2Se4Te1 (GSST). A 30-fold enhancement of third-harmonic generation is also demonstrated using a GSST metasurface operating in the mid-wave infrared region.

© 2021 The Author(s)

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