Low energy interband transitions in aluminium

Humbert, A.; Debever, J.M.; Hanus, Jean‐Luc; Jourdan, C.

doi:10.1051/jphyslet:019770038024047900

Cited by 5 publications

(9 citation statements)

References 11 publications

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“…Our measurements of dR / dT for Al are in good agreement with a prior quantitative study. 6 We do not expect perfect agreement between our results and Ref. 6 because the state of strain in our experiment is not the same; in Ref.…”

Section: Resultscontrasting

confidence: 50%

“…6 We do not expect perfect agreement between our results and Ref. 6 because the state of strain in our experiment is not the same; in Ref. 6, the Al sample is unstrained while in our experiment, heating of the near-surface region of the Al sample produces a biaxial compressive stress in the near-surface region due to thermal expansion.…”

Section: Resultsmentioning

confidence: 47%

“…6 because the state of strain in our experiment is not the same; in Ref. 6, the Al sample is unstrained while in our experiment, heating of the near-surface region of the Al sample produces a biaxial compressive stress in the near-surface region due to thermal expansion. Since this strain also has some effect on optical reflectivity, our measurements of dR / dT include a small strain component.…”

Section: Resultsmentioning

confidence: 75%

“…19 Al has an exceptionally large thermoreflectance at optical wavelengths near 800 nm. 6 The other desirable properties of Al thin films are high thermal conductivity and good adherence to most substrates. On the other hand, the low melting point of Al prevents its use at high temperatures and even at temperatures far below the melting point of Al, Al may chemically react or form alloys with many materials of interest.…”

Section: Introductionmentioning

confidence: 99%

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Thermoreflectance of metal transducers for time-domain thermoreflectance

Wang

Park

Koh

et al. 2010

Journal of Applied Physics

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We report measurements of the temperature dependence of the optical reflectivity, i.e., the thermoreflectance dR / dT, of 18 metallic elements at two laser wavelengths commonly used in ultrafast pump-probe experiments, 1.55 m and 785 nm. The thermoreflectance is determined using time-domain thermoreflectance combined with measurements of the laser power and spot size and comparisons between the data and quantitative modeling of the temperature evolution at the surface of the sample. At a laser wavelength of 1.55 m, four elements within this set of samples, Nb, Re, Ta, and V, have dR / dT comparable to or larger than 0.6ϫ 10 −4 K −1 . At a laser wavelength of 785 nm, the highest thermoreflectance is found in Al and Ta, dR / dT Ϸ 2.1ϫ 10 −4 K −1 and 2.2 ϫ 10 −4 K −1 , respectively. Alloying Au with 5% Pd increases the optical absorption by a factor of 3 and the thermoreflectance by a factor of 2.

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Section: Resultscontrasting

confidence: 50%

Section: Resultsmentioning

confidence: 47%

Section: Resultsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

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Thermoreflectance of metal transducers for time-domain thermoreflectance

Wang

Park

Koh

et al. 2010

Journal of Applied Physics

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“…The temperature response of interband absorption in aluminum is characterized by broadening and shifting of the peak toward lower energy, largely induced by lattice volume dependence of the pseudopotential. 19,21 Such a shift would decrease the magnitude of C TR (Figure 3). The higher rate of change in C TR with temperature is attributed to the larger thermal expansion coefficient of aluminum relative to the other metals.…”

Section: Aluminummentioning

confidence: 93%

Characterization of the temperature dependence of the thermoreflectance coefficient for conductive thin films

Favaloro

Bahk

Shakouri

2015

Review of Scientific Instruments

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We describe a novel approach for calibration of the thermoreflectance coefficient, ideally suited for measurements in a vacuum thermostat, and present the high temperature thermoreflectance coefficients for several metals commonly encountered in electronic devices: gold, platinum, and aluminum. The effect of passivation on these metals is also examined, and we demonstrate the signal to noise ratio of a thermoreflectance measurement can be improved with informed selection of the dielectric layer thickness. Furthermore, the thermo-optic coefficients of the metals are extracted over a wide temperature range. The results presented here can be utilized in the optimization of experimental configurations for high temperature thermoreflectance imaging.

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