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Article Dans Une Revue Sensors and Actuators B: Chemical Année : 2015

Influence of emissivity tailoring on radiative membranes thermal behavior for gas sensing applications

Résumé

Suspended micro-hotplates acting as infrared emitting sources are privileged energy-efficient sources for intended use in optical gas sensors. For such sources, the main constraints are the maximum operating temperature and the battery-limited available energy per measurement. Using simulations that take into account the dynamics of heating through the spatio-temporal radial profile, we first demonstrate how to design a thermally efficient membrane complying with these specifications. Once nonspecific thermal leaks are minimized, we show a further increase of the wall-plug efficiency by tailoring the membrane spectral emissivity with a metasurface in order to match the absorption spectrum of a gas of interest, e.g. CO 2 in this study. We consider the effects of an array of plasmonic resonators on the overall efficiency, and show non-trivial favorable effects on the thermal balance of the system.
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hal-01636547 , version 1 (26-08-2022)

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Anthony Lefebvre, Daniele Costantini, Giovanni Brucoli, Salim Boutami, Jean-Jacques Greffet, et al.. Influence of emissivity tailoring on radiative membranes thermal behavior for gas sensing applications. Sensors and Actuators B: Chemical, 2015, 213, pp.53 - 58. ⟨10.1016/j.snb.2015.02.056⟩. ⟨hal-01636547⟩
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