Thermal rectification through vacuum

Phys Rev Lett. 2010 Apr 16;104(15):154301. doi: 10.1103/PhysRevLett.104.154301. Epub 2010 Apr 13.

Abstract

We propose a mechanism for photon mediated thermal rectification through vacuum relying only on the temperature dependence of electromagnetic resonances. We also propose an example implementation consisting of two polytypes of silicon carbide, which exploits the interaction of temperature dependent surface phonon polaritons to achieve significant rectification.