Design of tunable infrared absorbers based on vanadium dioxide (Conference Presentation)

Romil Audhkhasi; Michelle L. Povinelli

doi:10.1117/12.2530588

9 September 2019 Design of tunable infrared absorbers based on vanadium dioxide (Conference Presentation)

Proceedings Volume 11081, Active Photonic Platforms XI; 110811R (2019) https://doi.org/10.1117/12.2530588
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

We present the design of tunable infrared absorbers/emitters based on hybrid metal / vanadium dioxide microstructures. We demonstrate tuning and extinction of infrared absorption peaks, based on the phase transition of vanadium dioxide from insulator to metal states. We assess the performance of specific optimized designs as thermal rectifiers, capable of allowing heat flow in one direction only. We optimize the structural parameters to maximize the rectification ratio. We then further adjust the material loss of the vanadium dioxide to determine the ideal loss values for this application. Intuitively, the results suggest that the loss in the metallic state should closely resemble that of the other metal used in the microstructure. The results thus suggest future directions for materials development efforts.

Conference Presentation

Citation Download Citation

Romil Audhkhasi and Michelle L. Povinelli "Design of tunable infrared absorbers based on vanadium dioxide (Conference Presentation)", Proc. SPIE 11081, Active Photonic Platforms XI, 110811R (9 September 2019); https://doi.org/10.1117/12.2530588

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