Cited by 116Thermal properties of materialsThermography and Photoacoustic TechniquesThermal Radiation and Cooling Technologies

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

Open access
Regner, K. T., Majumdar, S., Malen, J. A.·2013·Review of Scientific Instruments

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.

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Registry

Crossref · 10.1063/1.4808055

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33 of 33 references verified0 citation errors · 0 not checkable

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  • A heterodyne technique called broadband frequency-domain thermoreflectance (BB-FDTR) has been implemented to extend the modulation frequency up to 200 MHz.

    “A heterodyne technique called broadband frequencydomain thermoreflectance (BB-FDTR) 147 has thus been implemented to extend the modulation frequency up to 200 MHz .”
  • The frequency difference f1-f2 can be chosen to be close to the upper limit of the lock-in amplifier frequency range so that higher harmonic components are naturally excluded from lock-in detection.

    “Another benefit is that the frequency difference f 1 -f 2 can also be chosen to be close to the upper limit of the frequency range of the lock-in amplifier so that the higher harmonic components are naturally excluded from the lock-in detection. 147”
  • BB-FDTR was introduced to study phonon mean free path spectra in semiconductors, similar to frequency-dependent TDTR based on the physical picture of non-diffusive phonon transport.

    “For example, it was introduced to study phonon MFP spectra in semiconductors, 92, 147, 148 similar to the frequency-dependent TDTR that is based on the physical picture of non-diffusive phonon transport, see more details in Section IV(D).”

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Authors
Regner, K. T., Majumdar, S., & Malen, J. A.
Affiliations
Carnegie Mellon University (US)
Venue
Review of Scientific Instruments
Published
2013-06-01
Volume
84
Issue
6
Pages
064901-064901
ISSN
  • 0034-6748 (ISSN-L)
  • 1089-7623
OpenAlex
W1977710773
Cited by
116
References
34
Citations by year
2026: 12 · 2025: 21 · 2024: 10 · 2023: 7 · 2022: 9 · 2021: 5 · 2020: 9 · 2019: 5 · 2018: 6 · 2017: 10 · 2016: 11 · 2015: 6 · 2014: 3 · 2013: 2
FWCI
3.31
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Review of Scientific Instruments (publishedVersion)
  • PubMed (publishedVersion)
  • KiltHub Repository (submittedVersion)
  • Figshare (submittedVersion, cc-by)
  • KiltHub Repository
Funders
  • National Science Foundation (CAREER, 1149374)
  • American Chemical Society Petroleum Research Fund (PRF51423DN10)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
  • Physical Sciences › Engineering › Mechanics of Materials › Thermography and Photoacoustic Techniques
  • Physical Sciences › Engineering › Civil and Structural Engineering › Thermal Radiation and Cooling Technologies
Keywords
mean free path, signal-to-noise ratio

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