True thermal antenna with hyperbolic metamaterials
Optics
2017-10-11 v2
Abstract
A thermal antenna is an electromagnetic source which 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, possesses a Brewster angle which is weakly dependent on the wavelength, so that they can radiate like a true thermal antenna with a highly directional heat flux. The realization of these sources could open a new avenue in the field of thermal management in far-field regime.
Cite
@article{arxiv.1605.01247,
title = {True thermal antenna with hyperbolic metamaterials},
author = {Grégory Barbillon and Jean-Paul Hugonin and Svend-Age Biehs and Philippe Ben-Abdallah},
journal= {arXiv preprint arXiv:1605.01247},
year = {2017}
}