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.
Highlights
A majority of minimized integrated circuits merely use electrical functionality and are based on silicon (Si) technology
We demonstrate a thermal diode based on standard silicon processing technology using rectification of phonon transport
The diode consists of an array of differently shaped holes milled into the membrane by focused ion beam processing
Summary
A majority of minimized integrated circuits merely use electrical functionality and are based on silicon (Si) technology. We demonstrate a thermal diode based on standard silicon processing technology using rectification of phonon transport. We achieve a rectification ratio of the heat current of 1.7 at a temperature of 150 K.
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