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5 March 2022 Characterization of temperature-dependent optical properties of materials for metasurfaces in extreme conditions
Demeng Feng, Gabriel R. Jaffe, Shenwei Yin, Gregory R. Holdman, Chenghao Wan, Hongyan Mei, Min Seok Jang, Victor W. Brar, Mikhail A. Kats
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Proceedings Volume PC12011, High Contrast Metastructures XI; PC1201107 (2022) https://doi.org/10.1117/12.2609842
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
Knowledge of temperature-dependent optical properties of materials is required for photonics applications in extreme conditions, i.e., at high temperatures. In this talk, we will describe our latest measurements of temperature-dependent optical properties of materials (oxides, nitrides, semiconductors) for the development of metasurfaces for high-temperature applications that include thermal radiators and light sails. We use oscillator-based models to fit ellipsometry data at different temperatures in the wavelength region where a precise measurement can be made, and extrapolate to get broadband temperature-dependent optical properties. We also demonstrate using simulations how metasurface performance is affected by the temperature-dependence of constituent materials.
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Demeng Feng, Gabriel R. Jaffe, Shenwei Yin, Gregory R. Holdman, Chenghao Wan, Hongyan Mei, Min Seok Jang, Victor W. Brar, and Mikhail A. Kats "Characterization of temperature-dependent optical properties of materials for metasurfaces in extreme conditions", Proc. SPIE PC12011, High Contrast Metastructures XI, PC1201107 (5 March 2022); https://doi.org/10.1117/12.2609842
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KEYWORDS
Optical properties
Absorption
Data modeling
Photonics
Semiconductor materials
Semiconductors
Spectroscopic ellipsometry
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