Assessment of Fourier-Based Thermal Models Used in Frequency-Domain Thermoreflectance Data Analysis
Keyword(s):
We assess a Fourier-based thermal model used in frequency-domain thermoreflectance data analysis. The Boltzmann transport equation (BTE) is first used to simulate sub-continuum phonon transport in a semi-infinite solid. We then compare the BTE-predicted temperature profiles to those predicted by an analytical solution of the Fourier-based conduction equation. The two models agree well when ωτ < 1, where ω is the surface-temperature modulation-frequency and τ is the bulk phonon relaxation time, but diverge when ωτ > 1.
2012 ◽
Vol 26
(17)
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pp. 1250104
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2011 ◽
Vol 55-57
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pp. 1152-1155
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2014 ◽
Vol 66
(4)
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pp. 360-379
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Keyword(s):