Pushing the boundaries of the thermal conductivity of materials

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Time domain thermoreflectance since 2003 • Improved optical design • Normalization by out-ofphase signal eliminates artifacts, increases dynamic range and improves sensitivity • Exact analytical model for Gaussian beams and arbitrary layered geometries • One-laser/two-color approach tolerates diffuse scattering Clone built at Fraunhofer Institute for Physical Measurement, Jan. 7-8 2008
psec acoustics and time-domain thermoreflectance • Optical constants and reflectivity depend on strain and temperature • Strain echoes give acoustic properties or film thickness • Thermoreflectance gives thermal properties
Page 1 and 2: Pushing the boundaries of the therm
Page 3 and 4: Interfaces are critical at the nano
Page 5 and 6: Thermal conductivity and interface
Page 7 and 8: Brief introduction to thermoelectri
Page 9 and 10: Carbon nanotubes • Evidence for t
Page 11: Critical aspect ratio of a fiber co
Page 15 and 16: Windows software author: Catalin Ch
Page 17 and 18: Thermal conductivity map of a human
Page 19 and 20: Critical aspect ratio of a fiber co
Page 21 and 22: Can we beat the amorphous limit of
Page 23 and 24: Works well for homogeneous disorder
Page 25 and 26: W/Al 2 O 3 nanolaminates • ultra-
Page 27 and 28: Cross-sectional TEM of 60 nm thick
Page 29 and 30: Ion irradiation of WSe 2 MD simulat
Page 31 and 32: Molecular dynamics simulation • M
Page 33 and 34: Back to experiment: Can we lower th
Page 35: Conclusions • Difficult to take a

Pushing the boundaries of the thermal conductivity of materials

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