Pump-probe transient thermoreflectance (TTR) techniques are powerful tools for measuring the thermophysical properties of thin films, such as thermal conductivity, , or thermal boundary conductance, . This paper examines the assumption of one-dimensional heating on, and , 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.
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Criteria for Cross-Plane Dominated Thermal Transport in Multilayer Thin Film Systems During Modulated Laser Heating
Patrick E. Hopkins,
Patrick E. Hopkins
Engineering Sciences Center,
e-mail: pehopki@sandia.gov
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346
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Justin R. Serrano,
Justin R. Serrano
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346
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Leslie M. Phinney,
Leslie M. Phinney
ASME Fellow
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346
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Sean P. Kearney,
Sean P. Kearney
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346
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Thomas W. Grasser,
Thomas W. Grasser
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346
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C. Thomas Harris
C. Thomas Harris
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346
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Patrick E. Hopkins
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346e-mail: pehopki@sandia.gov
Justin R. Serrano
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346
Leslie M. Phinney
ASME Fellow
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346
Sean P. Kearney
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346
Thomas W. Grasser
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346
C. Thomas Harris
Engineering Sciences Center,
Sandia National Laboratories
, P.O. Box 5800, Albuquerque, NM 87185-0346J. Heat Transfer. Aug 2010, 132(8): 081302 (10 pages)
Published Online: May 20, 2010
Article history
Received:
August 24, 2009
Revised:
December 2, 2009
Online:
May 20, 2010
Published:
May 20, 2010
Citation
Hopkins, P. E., Serrano, J. R., Phinney, L. M., Kearney, S. P., Grasser, T. W., and Harris, C. T. (May 20, 2010). "Criteria for Cross-Plane Dominated Thermal Transport in Multilayer Thin Film Systems During Modulated Laser Heating." ASME. J. Heat Transfer. August 2010; 132(8): 081302. https://doi.org/10.1115/1.4000993
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