A thermal diode using phonon rectification
Abstract
A diode is an element blocking flow in one direction, but letting it pass in the other. The most prominent realization of a diode is an electrical rectifier. In this paper, we demonstrate a thermal diode based on standard silicon processing technology using rectification of phonon transport. We use a recently developed detection method to directly visualize the heat flow through such a device fabricated in a thin silicon membrane. The diode consists of an array of differently shaped holes milled into the membrane by focused ion beam processing. In our experiment, we achieve a rectification ratio of the heat current of 1.7 at a temperature of 150 K.
- Publication:
-
New Journal of Physics
- Pub Date:
- November 2011
- DOI:
- 10.1088/1367-2630/13/11/113027
- Bibcode:
- 2011NJPh...13k3027S