The effects of an optical excitation on the thermoreflectance spectra of a solid are studied. A photonic excitation with sufficient energy will cause a perturbation in the electron number density around the Fermi surface. As the number density changes, so do the plasma frequency and carrier scattering rates, creating a change in the thermoreflectance response. Not accounting for the appropriate electron number density around the Fermi level after an optical excitation leads to an underestimate of electron scattering rates.
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Research Article| January 25 2010
Thermoreflectance dependence on Fermi surface electron number density perturbations
Patrick E. Hopkins; Thermoreflectance dependence on Fermi surface electron number density perturbations. Appl. Phys. Lett. 25 January 2010; 96 (4): 041901. https://doi.org/10.1063/1.3292212
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