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arXiv · 2006.02076

Magnetic polariton-based thermal emitter for dual-band filterless gas sensing

Y. K. Chen·B. X. Wang·C. Y. Zhao
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Abstract

The miniaturization of infrared gas sensors is largely hindered by expensive and bulky laser sources as well as the use of optical filters. In this work, we propose a dual-band, directional thermal emitter based on compact W-Si-Cu metasurfaces to address this issue. This metasurface emitter is designed to support two nondispersive magnetic polariton modes that exhibit distinct directional thermal emission profiles, thus enabling dual-band detection without the need of optical filters. Specifically, we evaluate the feasibility of such dual-band filterless detection by adapting the metasurface emitter to CO2 sensing. The model of sensing system shows a selective relative sensitivity of CO2 which is 3.2 times higher than that using a blackbody emitter, and a relative sensitivity of temperature of emitter about 1.32%/K.

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Y. K. Chen, B. X. Wang, C. Y. Zhao. 2020-06-03. Magnetic polariton-based thermal emitter for dual-band filterless gas sensing. https://arxiv.org/abs/2006.02076

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