Figure 4: Measured emitted phonon power versus temperature.
From: Engineering thermal conductance using a two-dimensional phononic crystal
Grey squares show the data for the full, uncut membrane, red circles (a=970 nm) and blue triangles (a=2425, nm) the data for the two square PnC samples. The theoretical lines are given by Equation (1), using the computed band structures for each case, with (solid lines) or without (dashed lines) a phonon back radiation power from the substrate at bath temperature (60 mK for full membrane and PnC with a=970 nm, 80 mK for PnC with a=2425, nm). All three theory curves were fitted to the data with one common scale parameter. The size of symbols represent measurement errors.
