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True thermal antenna with hyperbolic metamaterials

Abstract : A thermal antenna is an electromagnetic source that emits in its surrounding a spatially coherent field in the infrared frequency range. Usually, its emission pattern changes with the wavelength so that the heat flux it radiates is weakly directive. Here, we show that a class of hyperbolic materials of type II possess a Brewster angle, which is weakly dependent on the wavelength, so that they can radiate like a true thermal antenna with a highly directional and p-polarized heat flux. The realization of these sources could open a new avenue in the field of thermal management in far-field regime.
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Contributor : Fatima Pereira Connect in order to contact the contributor
Submitted on : Tuesday, January 23, 2018 - 11:37:14 AM
Last modification on : Saturday, June 25, 2022 - 10:28:49 PM

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Grégory Barbillon, Emilie Sakat, Jean-Paul Hugonin, Svend-Age Biehs, Philippe Ben-Abdallah. True thermal antenna with hyperbolic metamaterials. Optics Express, Optical Society of America - OSA Publishing, 2017, 25 (19), pp.23356-23363. ⟨10.1364/OE.25.023356⟩. ⟨hal-01690634⟩



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