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Snapshots of displacements for a phonon wave packet of at 200 ps. From top to bottom, the thin film thickness, , equals to , , , , and , respectively.
Comparison of simulated phonon transmission coefficients with the AMM predictions for a wave packet of (a) and (b) across films of various thicknesses.
Phonon tunneling across thin films of various thicknesses for a wave packet of . Corresponding snapshots of phonon displacements for film thickness of , , , and are shown in the upper right inset.
Phonon tunneling across pure and composite thin films of various mass values for a wave packet of and film thickness of . Composite films containing a mixture of and 5 atoms (where is for the bulk material) are created by randomly changing with 5 atoms.
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