Mike Hettich

TL;DR: In this article, the authors assess the state of the art of nanophononics, describing the recent achievements and the open challenges in nanoscale heat transport, coherent phonon generation and exploitation, and in nano- and optomechanics.

TL;DR: The experimental results are compared with theories considering both intrinsic phonon-phonon interactions and extrinsic surface roughness scattering including a wavelength-dependent specularity to understand some of the limits of nanomechanical resonators and thermal transport in nanostructures.

TL;DR: In this article, the authors studied the relaxation of coherent acoustic phonon modes with frequencies up to 500 GHz in ultrathin free-standing silicon membranes and observed that the decay time of the first-order dilatational mode decreases significantly from 4: 7n sto 5 ps with decreasing membrane thickness from � 194 to 8 nm.

TL;DR: A topological state with protected propagation of elastic waves is achieved by appropriately engineering a phononic metamaterial based on 2D pentamode structures in silicon.

TL;DR: In this article, the authors quantitatively study interfacial adhesion in a two-layer membrane system consisting of Al and Si with femtosecond time-resolved laser spectroscopy.