Reconfigurable thermal emissivity using infrared metamaterials

Michelle L. Povinelli; Rehan Kapadia; Alok Ghanekar; Hyun Uk Chae; Romil Audhkhasi; Bo Shrewsbury; Ragib Ahsan

doi:10.1117/12.2661319

17 March 2023 Reconfigurable thermal emissivity using infrared metamaterials

Michelle L. Povinelli, Rehan Kapadia, Alok Ghanekar, Hyun Uk Chae, Romil Audhkhasi, Bo Shrewsbury, Ragib Ahsan

Proceedings Volume PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII; PC124310E (2023) https://doi.org/10.1117/12.2661319
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

We investigate methods for dynamic reshaping of the spectral and directional characteristics of thermal emissivity from warm objects, using micro patterning. In our design work, we propose infrared meta material structures for on/off switching of emissivity peaks. We use index perturbation to break the symmetry of a dark mode formed by coupling between a pair of resonators, allowing the mode to emit. We further introduce coupled cavity structures for which small index perturbations cause a large change in the dominant angle of thermal emission. In our experimental implementations, we demonstrate voltage tuning of spectral peaks in metamaterials based on epitaxial transfer of p-i-n GaAs structures to the intermediate layer of a MIM metamaterial.

Conference Presentation

Citation Download Citation

Michelle L. Povinelli, Rehan Kapadia, Alok Ghanekar, Hyun Uk Chae, Romil Audhkhasi, Bo Shrewsbury, and Ragib Ahsan "Reconfigurable thermal emissivity using infrared metamaterials", Proc. SPIE PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII, PC124310E (17 March 2023); https://doi.org/10.1117/12.2661319

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