Criteria for cross-plane dominated thermal transport in multilayer thin film systems during modulated laser heating / Patrick E. Hopkins in Journal of heat transfer, Vol. 132 N° 8 (Août 2010)  

Criteria for cross-plane dominated thermal transport in multilayer thin film systems during modulated laser heating [texte imprimé] / Patrick E. Hopkins, Auteur ; Justin R. Serrano, Auteur ; Leslie M. Phinney, Auteur . - pp. [081302-1/10].
Physique
Langues : Anglais (eng)
in Journal of heat transfer > Vol. 132 N° 8 (Août 2010) . - pp. [081302-1/10]

Mots-clés :	Pump-probe thermoreflectance Thin film thermal conductivity Thermal boundary conductance Radial heating Cross-plane transport
Index. décimale :	536 Chaleur. Thermodynamique
Résumé :	Pump-probe transient thermoreflectance (TTR) techniques are powerful tools for measuring the thermophysical properties of thin films, such as thermal conductivity, Lambda, or thermal boundary conductance, G. This paper examines the assumption of one-dimensional heating on, Lambda and G, determination in nanostructures using a pump-probe transient thermoreflectance technique. The traditionally used one-dimensional and axially symmetric cylindrical conduction models for thermal transport are reviewed. To test the assumptions of the thermal models, experimental data from Al films on bulk substrates (Si and glass) are taken with the TTR technique. This analysis is extended to thin film multilayer structures. The results show that at 11 MHz modulation frequency, thermal transport is indeed one dimensional. Error among the various models arises due to pulse accumulation and not accounting for residual heating.
DEWEY :	536
ISSN :	0022-1481
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