Vanadium-dioxide microstructures with enhanced thermal emission tunability

Romil Audhkhasi; Michelle L. Povinelli

doi:10.1117/12.2593422

1 August 2021 Vanadium-dioxide microstructures with enhanced thermal emission tunability

Proceedings Volume 11796, Active Photonic Platforms XIII; 1179620 (2021) https://doi.org/10.1117/12.2593422
Event: SPIE Nanoscience + Engineering, 2021, San Diego, 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 "Vanadium-dioxide microstructures with enhanced thermal emission tunability", Proc. SPIE 11796, Active Photonic Platforms XIII, 1179620 (1 August 2021); https://doi.org/10.1117/12.2593422

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