Integrating two-temperature and classical heat accumulation models to predict femtosecond laser processing of silicon

Taylor, L. L.; Scott, R. E.; Qiao, Jie

doi:10.1364/ome.8.000648

Cited by 53 publications

(27 citation statements)

References 20 publications

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“…The successful application of DHTSM [47][48][49][50][51][52] also indicates that the effect of the hyperbolic effect or relaxation time cannot be ignored, especially when the laser pulse time is comparable to or shorter than the electron relaxation time [49]. At the same time, the method of simulating the interaction between laser and material by coupling the TTM with other methods has also been developed, such as the coupling of TTM and molecular dynamics method (TTM-MD) [53][54][55][56], the coupling of TTM and hydrodynamic model (TTM-HD) [57,58], and the coupling of TTM and classical heat accumulation model [59]. Despite this, the limited validity of the TTM still exists [60][61][62][63], one of which is that the validity verification at higher laser fluence is still problematic [63].…”

Section: Introductionmentioning

confidence: 99%

A Model of Ultra-Short Pulsed Laser Ablation of Metal with Considering Plasma Shielding and Non-Fourier Effect

Tan

Wang

et al. 2018

Energies

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In this paper, a non-Fourier heat conduction model of ultra-short pulsed laser ablation of metal is established that takes into account the effect of the heat source, laser heating of the target, the evaporation and phase explosion of target material, the formation and expansion of the plasma plume, and interaction of the plasma plume with the incoming laser. Temperature dependent optical and thermophysical properties are also considered in the model due to the properties of the target will change over a wide range during the ultra-short pulsed laser ablation process. The results show that the plasma shielding has a great influence on the process of ultra-short pulsed laser ablation, especially at higher laser fluence. The non-Fourier effect has a great influence on the temperature characteristics and ablation depth of the target. The ultra-short pulsed laser ablation can effectively reduce the heat affected zone compared to nanosecond pulsed laser ablation. The comparison between the simulation results and the experimental results in the literature shows that the model with the plasma shielding and the non-Fourier effect can simulate the ultra-short pulsed laser ablation process better.

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Section: Introductionmentioning

confidence: 99%

A Model of Ultra-Short Pulsed Laser Ablation of Metal with Considering Plasma Shielding and Non-Fourier Effect

Tan

Wang

et al. 2018

Energies

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“…For a single scan ( n = 1), a rather flat morphology with randomly distributed small particles is observed. The absence of any of the typical self-organized structures (ripples, grooves and spikes) can be understood by the extreme situation of a very slow speed ( V = 0.002 m/s) and high repetition rate, leading to high heat accumulation [ 32 – 33 ]. Rescanning the sample area n times while maintaining a constant total number of pulses N eff_3D , leads to the formation of tiny cone-like structures of increasing diameter with the number of rescans.…”

Section: Resultsmentioning

confidence: 99%

“…It is worth pointing out that one possible additional reason for the pronounced differences in the CA for a given fluence is the different heat accumulation generated in the material during laser processing. As indicated in Table 1 , the use of a constant N eff_3D leads to different scan speeds and thus different heat accumulation [ 33 , 47 ].…”

Section: Resultsmentioning

confidence: 99%

Biomimetic surface structures in steel fabricated with femtosecond laser pulses: influence of laser rescanning on morphology and wettability

Baron¹,

Mimidis²,

Puerto³

et al. 2018

Beilstein J. Nanotechnol.

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The replication of complex structures found in nature represents an enormous challenge even for advanced fabrication techniques, such as laser processing. For certain applications, not only the surface topography needs to be mimicked, but often also a specific function of the structure. An alternative approach to laser direct writing of complex structures is the generation of laser-induced periodic surface structures (LIPSS), which is based on directed self-organization of the material and allows fabrication of specific micro- and nanostructures over extended areas. In this work, we exploit this approach to fabricate complex biomimetic structures on the surface of steel 1.7131 formed upon irradiation with high repetition rate femtosecond laser pulses. In particular, the fabricated structures show similarities to the skin of certain reptiles and integument of insects. Different irradiation parameters are investigated to produce the desired structures, including laser repetition rate and laser fluence, paying special attention to the influence of the number of times the same area is rescanned with the laser. The latter parameter is identified to be crucial for controlling the morphology and size of specific structures. As an example for the functionality of the structures, we have chosen the surface wettability and studied its dependence on the laser processing parameters. Contact angle measurements of water drops placed on the surface reveal that a wide range of angles can be accessed by selecting the appropriate irradiation parameters, highlighting also here the prominent role of the number of scans.

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“…where the laser heat addition (Q laser ¼ q in bA) is applied to the rst node as in the CW laser simulation but considered only in T e analysis. 58,85 At the wavelength of the FS laser (1030 nm), b has been reported to be 0.06. 81 During a pulse with 300 fs duration, we assume a constant laser heat ux, q in ¼ 1.77 Â 10 17 W m À2 (ESI Sec.…”

Section: Two-temperature Modelmentioning

confidence: 99%

Femtosecond laser-induced non-thermal welding for a single Cu nanowire glucose sensor

Deng

Hasan

et al. 2020

Nanoscale Adv.

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Integrating two-temperature and classical heat accumulation models to predict femtosecond laser processing of silicon

Cited by 53 publications

References 20 publications

A Model of Ultra-Short Pulsed Laser Ablation of Metal with Considering Plasma Shielding and Non-Fourier Effect

A Model of Ultra-Short Pulsed Laser Ablation of Metal with Considering Plasma Shielding and Non-Fourier Effect

Biomimetic surface structures in steel fabricated with femtosecond laser pulses: influence of laser rescanning on morphology and wettability

Femtosecond laser-induced non-thermal welding for a single Cu nanowire glucose sensor

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