Numerical Solver for an Ultrafast Laser Heating on Different 3-D Microscale Metallic Films

Tseng, Kuo-Hung; Tsai, Jih-Run

doi:10.1080/10407780701715810

Cited by 9 publications

(4 citation statements)

References 20 publications

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“…These optically induced dynamics have, as mentioned earlier, been studied in detail by other authors. [17][18][19][20][21][22] Under electrical bias, the TDTR signals become very similar after normalization to the square of the pulse magnitude V 2 mag , although we observe a small difference in the main peak between lower and higher biases [ Fig. 3(d)].…”

Section: Resultsmentioning

confidence: 84%

“…It is well known that thermal transients can occur very rapidly in metals due to the ultrafast heating of the free electrons 16 and subsequent fast energy interaction with the lattice phonons. 17 Theoretical models [17][18][19] and experimental verifications [19][20][21][22] have shown that the surface temperature of thin metal films subjected to an energy impulse responds virtually instantaneously and then decays rapidly with time constants well below 1 ps. All of these studies were based on optical stimulation of the metal; that is, the heating of the film is induced by a laser pulse.…”

Section: Introductionmentioning

confidence: 99%

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Picosecond Joule heating in photoconductive switch electrodes

et al. 2013

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We present experimental observations of picosecond Joule heating inside the gold metallization of ErAs:GaAs photoconductive switches. Femtosecond laser time-domain thermoreflectance is employed to resolve the fast thermal dynamics in the central switch electrode during generation and transmission of rf electrical pulses. Sharp features in the thermoreflectance signal scaling quadratically with the bias/pulse voltage reveal Joule heating with durations 5 ps inside the gold metal. The temporal shape and rise time of the signals is in excellent agreement with the theoretical pulse wave form and subpicosecond carrier lifetime of the active medium. Probing different locations on the electrode shows the propagation, attenuation, and dispersion of the electrical pulses along the coplanar waveguide structure. Overall, the presented photothermal experiments demonstrate great potential to reveal the internal dynamics of photoconductive switches, characterize transmission lines, and study ultrafast heating in metals.

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Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Picosecond Joule heating in photoconductive switch electrodes

et al. 2013

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“…1.4, the thermal and thermoelectric properties of carbon materials used in non-Fourier thermal simulations focusing on the results for graphene, carbon nanotubes, and nanostructured carbon materials have been reviewed in [17]. In addition, laser heating in microscale metals [155,[193][194][195] and phase-lagging heat transport in microchannels [206,207] have been reviewed in Sects. 9 and 10, respectively.…”

Section: Non-fourier Behavior In Micro/nanoscale Structuresmentioning

confidence: 99%

“…Heat conduction in a finite slab with a raised temperature at both ends and ultra-fast laser heating on a microscale gold film are simulated using the DPL model [193]. Temperature-dependent phase-lags are incorporated in the DPL model to fully describe the experimental data of femtosecond laser heating on gold films of various thicknesses in the sub-micron range [194].…”

Section: Microscale Metalsmentioning

confidence: 99%

Macro- to Nanoscale Heat and Mass Transfer: The Lagging Behavior

2015

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The classical model of the Fourier's law is known as the most common constitutive relation for thermal transport in various engineering materials. Although the Fourier's law has been widely used in a variety of engineering application areas, there are many exceptional applications in which the Fourier's law is questionable. This paper gathers together such applications. Accordingly, the paper is divided into two parts. The first part reviews the papers pertaining to the fundamental theory of the phase-lagging models and the analytical and numerical solution approaches. The second part wrap ups the various applications of the phase-lagging models including the biological materials, ultra-high-speed laser heating, the problems involving moving media, micro/nanoscale heat transfer, multi-layered materials, the theory of thermoelasticity, heat transfer in the material defects, the diffusion problems we call as the non-Fick models, and some other applications. It is predicted that the interest in the field of phase-lagging heat transport has grown incredibly in recent years because they show good agreement with the experiments across a wide range of length and time scales.

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Analysis of dual-phase-lag heat conduction in a two-dimensional slab heated by a moving annular laser pulse

Shen

Zhang

2022

Applied Mathematical Modelling

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Numerical Solver for an Ultrafast Laser Heating on Different 3-D Microscale Metallic Films

Cited by 9 publications

References 20 publications

Picosecond Joule heating in photoconductive switch electrodes

Picosecond Joule heating in photoconductive switch electrodes

Macro- to Nanoscale Heat and Mass Transfer: The Lagging Behavior

Analysis of dual-phase-lag heat conduction in a two-dimensional slab heated by a moving annular laser pulse

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