Enhanced thermal emission tunability using vanadium-dioxide microstructures

Romil Audhkhasi; Michelle L. Povinelli

doi:10.1117/12.2607899

5 March 2022 Enhanced thermal emission tunability using vanadium-dioxide microstructures

Proceedings Volume PC12010, Photonic and Phononic Properties of Engineered Nanostructures XII; PC1201009 (2022) https://doi.org/10.1117/12.2607899
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We propose gold-vanadium dioxide microstructured emitters for which the difference in thermally radiated power between two predefined temperatures can be made positive, negative or zero via structural design. The emitter geometry is based on incorporating VO2 in a gold-dielectric-gold waveguide. Such a waveguide exhibits a temperature-dependent mode effective index owing to the phase-changing behavior of VO2. This in turn causes our emitters to exhibit a strongly temperature-dependent emissivity. We use our emitters to design a metasurface with a thermally-invertible spatial emission pattern. Such emitters could be useful for several intriguing applications such as remote temperature monitoring and thermoelectric power generation.

Conference Presentation

Citation Download Citation

Romil Audhkhasi and Michelle L. Povinelli "Enhanced thermal emission tunability using vanadium-dioxide microstructures", Proc. SPIE PC12010, Photonic and Phononic Properties of Engineered Nanostructures XII, PC1201009 (5 March 2022); https://doi.org/10.1117/12.2607899

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