Near-field Thermal emission of sapphire at high-T: precisely locating the T dependent polariton resonances in view of energy conversion
Résumé
In the near-field of a hot (T 1100 K) window, we use atom spectroscopy as an ultra narrow spectral filter to probe the T-dependent surface polariton resonance of sapphire (~12.2µm). The results agree only partly with predictions derived from broadband far-field emissivity. Sapphire birefringence makes predictions difficult, but adds to versatility. Near-field thermal emission could be converted into a molecular excitation, opening a path to electrical conversion.
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de Aquino Carvalho _Full Length Abstract_NF emission of sapphire at high-T_precisely locating the polariton.pdf (170.03 Ko)
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