Multilayer broadband switchable absorbers based on phase-change materials

Md Tanvir Emrose; Emily L. Payne; Chenglong You; Georgios Veronis

doi:10.1117/12.2677847

4 October 2023 Multilayer broadband switchable absorbers based on phase-change materials

Md Tanvir Emrose, Emily L. Payne, Chenglong You, Georgios Veronis

Proceedings Volume 12647, Active Photonic Platforms (APP) 2023; 126470M (2023) https://doi.org/10.1117/12.2677847
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Conference Poster

Abstract

We introduce multilayer structures with the phase-change material germanium-antimony-tellurium (GST) for use as broadband switchable absorbers in the infrared wavelength range. We use a memetic optimization algorithm coupled with the transfer-matrix method to optimize both the material composition and the layer thicknesses of the multilayer structures. We show that in the optimized structures near perfect absorption can be switched to very low absorption in a broad wavelength range by switching GST from its crystalline to its amorphous phase. Our results could pave the way to a new class of broadband switchable absorbers and thermal sources in the infrared wavelength range.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Md Tanvir Emrose, Emily L. Payne, Chenglong You, and Georgios Veronis "Multilayer broadband switchable absorbers based on phase-change materials", Proc. SPIE 12647, Active Photonic Platforms (APP) 2023, 126470M (4 October 2023); https://doi.org/10.1117/12.2677847

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