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arXiv · 1908.01247

Surface phonon-polaritons enhance thermal conduction in SiN nanomembranes

Yunhui Wu·Jose Ordonez-Miranda·Sergei Gluchko·Roman Anufriev·Sebastian Volz·Masahiro Nomura
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Abstract

Surface phonon-polaritons can carry energy on the surface of dielectric films and thus are expected to contribute to heat conduction. However, the contribution of surface phonon-polaritons (SPhPs) to thermal transport has not been experimentally demonstrated yet. In this work, we experimentally measure the effective in-plane thermal conductivity of amorphous silicon nitride membrane and show that it can indeed be increased by SPhPs significantly when the membrane thickness scales down. In particular, by heating up a thin membrane (<100 nm) from 300 to 800 K, the thermal conductivity increases twice due to SPhPs contribution.

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Yunhui Wu, Jose Ordonez-Miranda, Sergei Gluchko, Roman Anufriev, Sebastian Volz, Masahiro Nomura. 2019-08-04. Surface phonon-polaritons enhance thermal conduction in SiN nanomembranes. https://arxiv.org/abs/1908.01247

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