DOI: 10.1063/1.4808055. Instrumentation of broadband frequency domain thermoreflectance for measuring thermal conductivity accumulation functions

Instrumentation of broadband frequency domain thermoreflectance for measuring thermal conductivity accumulation functions

10.1063/1.4808055

Crossref journal-article

AIP Publishing

Review of Scientific Instruments (317)

Abstract

This paper describes the instrumentation for broadband frequency domain thermoreflectance (BB-FDTR), a novel, continuous wave laser technique for measuring the thermal conductivity accumulation function. The thermal conductivity accumulation function describes cumulative contributions to the bulk thermal conductivity of a material from energy carriers with different mean free paths. It can be used to map reductions in thermal conductivity in nano-devices, which arise when the dimensions of the device are commensurate to the mean free path of energy carriers. BB-FDTR uses high frequency surface temperature modulation to generate non-diffusive phonon transport realized through a reduction in the perceived thermal conductivity. By controlling the modulation frequency it is possible to reconstruct the thermal conductivity accumulation function. A unique heterodyning technique is used to down-convert the signal, therein improving our signal to noise ratio and enabling results over a broader range of modulation frequencies (200 kHz–200 MHz) and hence mean free paths.

Bibliography

Regner, K. T., Majumdar, S., & Malen, J. A. (2013). Instrumentation of broadband frequency domain thermoreflectance for measuring thermal conductivity accumulation functions. Review of Scientific Instruments, 84(6).

Authors 3

K. T. Regner (first)
S. Majumdar (additional)
J. A. Malen (additional)

References 32 Referenced 91

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Dates

Type	When
Created	12 years, 2 months ago (June 6, 2013, 6:07 p.m.)
Deposited	2 years, 1 month ago (July 3, 2023, 1:56 p.m.)
Indexed	1 day, 4 hours ago (Aug. 22, 2025, 12:52 a.m.)
Issued	12 years, 2 months ago (June 1, 2013)
Published	12 years, 2 months ago (June 1, 2013)
Published Online	12 years, 2 months ago (June 6, 2013)
Published Print	12 years, 2 months ago (June 1, 2013)

Funders 0

None

BibTeX

@article{Regner_2013, title={Instrumentation of broadband frequency domain thermoreflectance for measuring thermal conductivity accumulation functions}, volume={84}, ISSN={1089-7623}, url={http://dx.doi.org/10.1063/1.4808055}, DOI={10.1063/1.4808055}, number={6}, journal={Review of Scientific Instruments}, publisher={AIP Publishing}, author={Regner, K. T. and Majumdar, S. and Malen, J. A.}, year={2013}, month=jun }

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