Figure 2
(a) Measured silicon thermal conductivities (circles and squares), DFT computed thermal conductivity (diamonds) and the literature data (solid line, ref. 38). (b) Representative traces of measured room temperature TDTR reflectance signals (circles) and best model fits (solid lines) for three heater widths: 50 nm, 220 nm and 2 μm. The effective thermal conductivities for these three samples are approximately 66.0 W/mK, 120.0 W/mK and 140.0 W/mK, respectively. (c) Silicon effective thermal conductivities versus heater width at 200 K, 250 K, 300 K and 350 K, respectively. The error bars represent standard deviations in the measured thermal conductivities. The filled dots represent silicon bulk thermal conductivity from literature (ref. 38) at four different temperatures (circle: 200 K; square: 250 K; triangle: 300 K; diamond: 350 K).
