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Surface Phonon-polariton Mediated Thermal Conductivity Enhancement
of Amorphous Thin Films

Narayanaswamy, Arvind; Chen, Gang; Chen, Dye-Zone

We predict theoretically that the effective in-plane thermal conductivity of polar, amorphous thin films can be increased by surface phonon-polaritons significantly beyond their intrinsic bulk values. We show that the thermal conductivity due to surface phonon-polaritons increases with decreasing film thickness. In particular, for a 40-nm-thick film of amorphous silicon dioxide, we calculate a total thermal conductivity of 4 W m−1 K−1 at 500 K, which is an increase of ∼100% over the intrinsic phonon thermal conductivity.

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Also Published In

Title
Physical Review B
DOI
https://doi.org/10.1103/PhysRevB.72.155435

More About This Work

Academic Units
Mechanical Engineering
Published Here
April 3, 2013