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Published May 15, 2014 | Submitted + Published
Journal Article Open

Coherent and Incoherent Thermal Transport in Nanomeshes

Abstract

Coherent thermal transport in nanopatterned structures is a topic of considerable interest, but whether it occurs in certain structures remains unclear due to a poor understanding of which phonons conduct heat. Here, we perform fully three-dimensional, frequency-dependent simulations of thermal transport in nanomeshes by solving the Boltzmann transport equation with an efficient Monte Carlo method. From the spectral information in our simulations, we show that thermal transport in nanostructures that can be created with available lithographic techniques is dominated by incoherent boundary scattering at room temperature. Our result provides important insights into the conditions required for coherent thermal transport to occur in artificial structures.

Additional Information

© 2014 American Physical Society. Received 12 November 2013; revised manuscript received 17 March 2014; published 27 May 2014. This work is part of the "Light-Material Interactions in Energy Conversion" Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DE-SC0001293.

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Published - PhysRevB.89.205432.pdf

Submitted - 1403.7647v1.pdf

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