A1 Journal article (refereed)
Controlling thermal conductance using three-dimensional phononic crystals (2021)

Heiskanen, S., Puurtinen, T. A., & Maasilta, I. J. (2021). Controlling thermal conductance using three-dimensional phononic crystals. APL Materials, 9(8), Article 081108. https://doi.org/10.1063/5.0057385

JYU authors or editors

Publication details

All authors or editors: Heiskanen, Samuli; Puurtinen, Tuomas A.; Maasilta, Ilari J.

Journal or series: APL Materials

eISSN: 2166-532X

Publication year: 2021

Publication date: 01/08/2021

Volume: 9

Issue number: 8

Article number: 081108

Publisher: AIP Publishing

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1063/5.0057385

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/77420

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2104.13779

Abstract

Controlling thermal transport at the nanoscale is vital for many applications. Previously, it has been shown that this control can be achieved with periodically nanostructured two-dimensional phononic crystals for the case of suspended devices. Here, we show that thermal conductance can also be controlled with three-dimensional phononic crystals, allowing the engineering of the thermal contact of more varied devices without the need for suspension in the future. We show the experimental results obtained at sub-Kelvin temperatures for two different period three-dimensional crystals and for a bulk control structure. The results show that the conductance can be enhanced with the phononic crystal structures in our geometry. This result cannot be fully explained by the simplest theory taking into account the coherent modification of the phonon band structure, calculated by finite element method simulations.

Keywords: nanostructures; crystals; heat transfer; heat conduction; phonons

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Related projects

Ministry reporting: Yes

VIRTA submission year: 2021

JUFO rating: 2