True thermal antenna with hyperbolic metamaterials

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.

References in corpus (1)

• On Super-Planckian thermal emission in far field regime

Cited by in corpus (4)

• Broadband directional control of thermal emission
• Strong Coupling of Collection of Emitters on Hyperbolic Meta-Material
• Tailoring the Spectral and Directional Emissivity of Functionalized Laser Processed Surfaces
• Broadband directional thermal emission with anisothermal microsources