Study the heat transfer process from electron-phonon nonequilibrium in thin gold film to glass substrate through transient thermoreflectance measurements

Weigang Ma, Haidong Wang, Xing Zhang, Wei Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

How the energy transfers during electron-phonon nonequilibrium in thin metal films is still an open question, and how to measure the intrinsic thermal transport properties of the material under the covering layer is another challenge. In this paper, the heat transfer process from electron-phonon nonequilibrium in thin gold film to borosilicate glass substrate has been studied by resorting to different segments of the transient thermoreflectance signal, which is obtained from the rear-pump front-probe transient thermoreflectance technique. The gold film, which has a thickness of 23.1 nm, is deposited on the borosilicate glass substrate using using a physical vapor deposition (PVD) approach. Within the framework of the twotemperature model (TTM), the electron-phonon (e-ph) coupling factors of the gold film, which reflect the strength of heat flow from hot electrons to cold phonons, are derived from the signal taken after the first several picoseconds with different pump fluences, and the measured value is (1.95-2.05)×1016 W m-3 K-1. The electron-phonon coupling factor does not significantly change in response to the pump pulse fluence variation and exhibits little change compared to the bulk gold value 2.4× 10 16 W m-3 K-1. Furthermore, the thermal conductivity of the glass substrate is obtained through the thermoreflectance signal between 20 to 140 picoseconds and the value is 3 W m-1 K -1.

Original languageEnglish
Title of host publicationASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010
Pages625-632
Number of pages8
EditionPARTS A AND B
DOIs
Publication statusPublished - Dec 1 2010
EventASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2010 Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting - Montreal, QC, Canada
Duration: Aug 1 2010Aug 5 2010

Publication series

NameASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010
NumberPARTS A AND B

Other

OtherASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2010 Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting
CountryCanada
CityMontreal, QC
Period8/1/108/5/10

Fingerprint

Gold
Heat transfer
Glass
Borosilicate glass
Electrons
Pumps
Substrates
Hot electrons
Physical vapor deposition
Phonons
Transport properties
Energy transfer
Thermal conductivity
Metals

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

Cite this

Ma, W., Wang, H., Zhang, X., & Wang, W. (2010). Study the heat transfer process from electron-phonon nonequilibrium in thin gold film to glass substrate through transient thermoreflectance measurements. In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010 (PARTS A AND B ed., pp. 625-632). (ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010; No. PARTS A AND B). https://doi.org/10.1115/FEDSM-ICNMM2010-30364

Study the heat transfer process from electron-phonon nonequilibrium in thin gold film to glass substrate through transient thermoreflectance measurements. / Ma, Weigang; Wang, Haidong; Zhang, Xing; Wang, Wei.

ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010. PARTS A AND B. ed. 2010. p. 625-632 (ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010; No. PARTS A AND B).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ma, W, Wang, H, Zhang, X & Wang, W 2010, Study the heat transfer process from electron-phonon nonequilibrium in thin gold film to glass substrate through transient thermoreflectance measurements. in ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010. PARTS A AND B edn, ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010, no. PARTS A AND B, pp. 625-632, ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2010 Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, Montreal, QC, Canada, 8/1/10. https://doi.org/10.1115/FEDSM-ICNMM2010-30364
Ma W, Wang H, Zhang X, Wang W. Study the heat transfer process from electron-phonon nonequilibrium in thin gold film to glass substrate through transient thermoreflectance measurements. In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010. PARTS A AND B ed. 2010. p. 625-632. (ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010; PARTS A AND B). https://doi.org/10.1115/FEDSM-ICNMM2010-30364
Ma, Weigang ; Wang, Haidong ; Zhang, Xing ; Wang, Wei. / Study the heat transfer process from electron-phonon nonequilibrium in thin gold film to glass substrate through transient thermoreflectance measurements. ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010. PARTS A AND B. ed. 2010. pp. 625-632 (ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010; PARTS A AND B).
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