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Journal articles on the topic 'Femtosecond ablation'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Hua, Yang, Zhenduo Zhang, Jiyu Du, et al. "Experimental and Simulation Research on Femtosecond Laser Induced Controllable Morphology of Monocrystalline SiC." Micromachines 15, no. 5 (2024): 573. http://dx.doi.org/10.3390/mi15050573.

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Silicon carbide (SiC) is utilized in the automotive, semiconductor, and aerospace industries because of its desirable characteristics. Nevertheless, the traditional machining method induces surface microcracks, low geometrical precision, and severe tool wear due to the intrinsic high brittleness and hardness of SiC. Femtosecond laser processing as a high-precision machining method offers a new approach to SiC processing. However, during the process of femtosecond laser ablation, temperature redistribution and changes in geometrical morphology features are caused by alterations in carrier densi

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2

WANG, C. Z., and K. M. HO. "ATOMISTIC SIMULATION OF LASER ABLATION OF DIAMOND AND SILICON (111) SURFACE." Surface Review and Letters 06, no. 06 (1999): 1025–30. http://dx.doi.org/10.1142/s0218625x99001104.

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Tight-binding molecular dynamics simulations are performed to study femtosecond-laser ablation of diamond and silicon (111) surface. The simulation results show that under intense ultrafast laser ablation the diamond (111) surface graphitizes while the silicon (111) surface melts spontaneously. All structural changes occur within a few hundred femtoseconds, which is much shorter than the typical lattice dynamics time scale, in consistent with experimental observations.

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3

Sano, Tomokazu, Kengo Takahashi, Akio Hirose, and Kojiro F. Kobayashi. "Femtosecond Laser Ablation of Zr₅₅Al₁₀Ni₅Cu₃₀ Bulk Metallic Glass." Materials Science Forum 539-543 (March 2007): 1951–54. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1951.

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Dependence of the femtosecond laser ablation depth on the laser pulse energy was investigated for Zr55Al10Ni5Cu30 bulk metallic glass. Investigation of the femtosecond laser ablation of bulk metallic glasses has not been reported. Femtosecond laser pulses (wavelength of 800 nm, pulse width of 100 fs, pulse energies of 2 – 900 μJ) were focused and irradiated on the polished surface of metals in air. The ablation depth of the metallic glass is deeper than that of its crystallized metal at a pulse energy in the strong ablation region. We suggest that the energy loss at grain boundaries of hot ele

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4

Xiang, Ran, Xin Yu Tan, and Hui Li Wei. "Influence of Electron-Phonon Coupling Coefficient on Properties in Femtosecond Laser Ablation." Materials Science Forum 814 (March 2015): 144–49. http://dx.doi.org/10.4028/www.scientific.net/msf.814.144.

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Thermodynamics effects generated by femtosecond laser ablation are very important. In this work, the numerical simulation of high-energy femtosecond laser ablation especially the electro-phonon coupling coefficient influence of high-energy femtosecond laser ablation on metal target was studied. A new two-temperature model (TTM) which considered the effects of electron density of states (DOS) on electron-phonon coupling coefficient was first established, then the temperature evolvement for electron and lattice in different electro-phonon coupling coefficient G, and the effect of G on electron t

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5

Dong, Yiwei, Qianwen Ye, Qi Li, Xiang Guo, Saitao Zhang, and Naixian Hou. "Numerical Simulation and Validation of Multiscale 3D Laser Spiral Machining of Microholes." Laser and Particle Beams 2022 (March 9, 2022): 1–9. http://dx.doi.org/10.1155/2022/2455226.

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Femtosecond laser ablation is widely applied in high-precision machining of microholes in aeroengine turbine blades. To further explore the mechanism of action during the laser processing of microholes, numerical simulations were performed on the basis of a molecular dynamics (MD) method coupled with a two-temperature model (TTM). Laser irradiation on the surface of copper for different femtosecond-laser processing parameters is investigated in this work. Through the femtosecond-laser single-pulse central ablation simulation model, the laser energy flux density in a Gaussian laser spot range w

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6

Feng, Tao, Gong Chen, Hainian Han, and Jie Qiao. "Femtosecond-Laser-Ablation Dynamics in Silicon Revealed by Transient Reflectivity Change." Micromachines 13, no. 1 (2021): 14. http://dx.doi.org/10.3390/mi13010014.

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The dynamics of ablation in monocrystalline silicon, from electron-hole plasma generation to material expansion, upon irradiation by a single femtosecond laser pulse (1030 nm, 300 fs pulse duration) at a wide range of fluences is investigated using a time-resolved microscopy technique. The reflectivity evolution obtained from dynamic images in combination with a theoretical Drude model and a Two-Temperature model provides new insights on material excitation and ablation process. For all fluences, the reflectivity increased to a temporary stable state after hundreds of femtoseconds. This behavi

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7

Wang, Yiyang, Shanshan Liang, Yongsheng Zhou, Fusong Yuan, and Hongqiang Ye. "Parameter Optimization, Morphological and Histological Characteristics of Accurate Bone Ablation by Femtosecond Laser: An In Vitro Study." Bioengineering 12, no. 3 (2025): 217. https://doi.org/10.3390/bioengineering12030217.

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The use of femtosecond laser for bone ablation has been demonstrated in numerous studies; however, the clinical application requires further optimization to meet safety, accuracy, and efficiency standards. This study aims to optimize the energy density parameter of a robot-controlled femtosecond laser surgical system for bone ablation by assessing temperature changes, ablation efficiency, and ablation effects. Furthermore, the morphological and histological characteristics of bone tissue were compared with those of conventional mechanical methods. The results indicated that a laser energy dens

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8

Merano, Michele, Gilbert Boyer, Alexandre Trisorio, Gilles Chériaux, and Gérard Mourou. "Superresolved femtosecond laser ablation." Optics Letters 32, no. 15 (2007): 2239. http://dx.doi.org/10.1364/ol.32.002239.

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9

Pan, Yun Ping, Wen Juan Yang, and Yi Min Mo. "Ablation Characteristic Analysis of Short Pulse Laser Processing Composite Materials." Advanced Materials Research 189-193 (February 2011): 3759–63. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3759.

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Short pulse lasers, including picosecond laser and femtosecond laser are involved to investigate the ablation characteristics of processing carbon fiber reinforced plastics (CFRPs). The ablation threshold of the femtosecond laser, 0.453 J/cm2, is twice higher than that of the picosecond laser 0.867 J/cm2, since the former generates an intense and shorter pulse and the atoms excitation and multi-photon absorption may occur as short as 10 ps or less. The ablation test also describes the processing qualities, where the femtosecond laser has processing abilities without visible thermal defects or

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10

Obata, Kotaro, Francesc Caballero-Lucas, Shota Kawabata, Godai Miyaji, and Koji Sugioka. "GHz bursts in MHz burst (BiBurst) enabling high-speed femtosecond laser ablation of silicon due to prevention of air ionization." International Journal of Extreme Manufacturing 5, no. 2 (2023): 025002. http://dx.doi.org/10.1088/2631-7990/acc0e5.

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Abstract For the practical use of femtosecond laser ablation, inputs of higher laser intensity are preferred to attain high-throughput material removal. However, the use of higher laser intensities for increasing ablation rates can have detrimental effects on ablation quality due to excess heat generation and air ionization. This paper employs ablation using BiBurst femtosecond laser pulses, which consist of multiple bursts (2 and 5 bursts) at a repetition rate of 64 MHz, each containing multiple intra-pulses (2–20 pulses) at an ultrafast repetition rate of 4.88 GHz, to overcome these conflict

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11

Mačernytė, Lina, Julius Skruibis, Virgilijus Vaičaitis, Romualdas Sirutkaitis, and Ona Balachninaitė. "Femtosecond Laser Micromachining of Soda–Lime Glass in Ambient Air and under Various Aqueous Solutions." Micromachines 10, no. 6 (2019): 354. http://dx.doi.org/10.3390/mi10060354.

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We have studied femtosecond ablation of soda–lime glass sample under thin water film, under KOH and NaCl aqueous solutions films and their influence and benefits compared with ablation in the air atmosphere. These have been studied in case of the groove ablation using the infrared (IR) femtosecond laser. KOH aqueous solution film above the glass sample improved the ablation efficiency and led to the formation of the grooves with a higher aspect ratio when multi-scan glass cutting conditions were applied.

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12

Xu, Xianfan, Changrui Cheng, and Ihtesham H. Chowdhury. "Molecular Dynamics Study of Phase Change Mechanisms During Femtosecond Laser Ablation." Journal of Heat Transfer 126, no. 5 (2004): 727–34. http://dx.doi.org/10.1115/1.1797011.

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In this work, Molecular Dynamics (MD) simulation is employed to investigate femtosecond laser ablation of copper, with an emphasis on the understanding of the mechanism of phase change during laser ablation. Laser induced heat transfer, melting, surface evaporation, and material ablation are studied. Theoretically, it has been suggested that under intense femtosecond laser irradiation, the material undergoes a volumetric phase change process; its maximum temperature can be close to or even above the thermodynamic critical point. The MD simulations allow us to determine the transient temperatur

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13

Kautz, Elizabeth J., Jeremy Yeak, Bruce E. Bernacki, Mark C. Phillips, and Sivanandan S. Harilal. "The role of ambient gas confinement, plasma chemistry, and focusing conditions on emission features of femtosecond laser-produced plasmas." Journal of Analytical Atomic Spectrometry 35, no. 8 (2020): 1574–86. http://dx.doi.org/10.1039/d0ja00111b.

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14

Duryea, Devyn, and Nirmala Kandadai. "Laser-induced galfenol embedded multi-layer graphene-oxide in solution." AIP Advances 12, no. 9 (2022): 095011. http://dx.doi.org/10.1063/5.0106184.

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The proposed work demonstrates the direct synthesis of nanomaterial-embedded laser-induced few-layer graphene-oxide by directly ablating galfenol in a water-based solution for the first time. Laser-induced multilayer graphene-oxide (GO) embedded with galfenol (gallium–iron alloy) nanoparticles (NPs) is created through a method of direct laser inscription of bulk galfenol in deionized (DI) water with femtosecond laser ablation. The NP-embedded GO is achieved by irradiating a near-infrared (near-IR) femtosecond laser at 1040 nm on a bulk galfenol material submerged in a solution comprising DI wa

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15

Xu, Jingxiang, Dengke Xue, Oleg Gaidai, Yang Wang, and Shaolin Xu. "Molecular Dynamics Simulation of Femtosecond Laser Ablation of Cu50Zr50 Metallic Glass Based on Two-Temperature Model." Processes 11, no. 6 (2023): 1704. http://dx.doi.org/10.3390/pr11061704.

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Femtosecond laser machining, characterized by a small heat-affected zone, high precision, and non-contact operation, is ideal for processing metallic glasses. In this study, we employed a simulation method that combines the two-temperature model with molecular dynamics to investigate the effects of fluence and pulse duration on the femtosecond laser ablation of Cu50Zr50 metallic glass. Our results showed that the ablation threshold of the target material was 84 mJ/cm2 at a pulse duration of 100 fs. As the pulse durations increased, the maximum electron temperature at the same position on the t

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16

Wang, Hongjie, Fangyue Wang, Yan Zhao, et al. "Application of Quartz LA-ICP-MS Analysis in the Evaluation of High-Purity Quartz Deposits." Minerals 15, no. 4 (2025): 400. https://doi.org/10.3390/min15040400.

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High-purity quartz is considered one of the world’s scarce mineral resources. During the evaluation process of high-purity quartz raw material deposits, metallurgical purification evaluation experiments are often required to assess the quality of quartz. However, these experiments are costly and time-consuming, and have other drawbacks. In addition, high-purity quartz is difficult to analyze by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) due to its extremely low impurity content, resulting in low accuracy. It is therefore essential to assess the validity of the resu

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17

Wang, Mingyuan, Tong Zhang, Yanping Yuan, Zhiyong Wang, Yanlei Liu, and Lin Chen. "Simulation and Experimental Study of the Single-Pulse Femtosecond Laser Ablation Morphology of GaN Films." Micromachines 16, no. 1 (2025): 85. https://doi.org/10.3390/mi16010085.

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Gallium nitride (GaN) exhibits distinctive physical and chemical properties that render it indispensable in a multitude of electronic and optoelectronic devices. Given that GaN is a typical hard and brittle material that is difficult to machine, femtosecond laser technology provides an effective and convenient tool for processing such materials. However, GaN undergoes complex physical and chemical changes during high-power ablation, which poses a challenge to high-precision processing with controllable geometry. In this study, the quantitative relationship between the parameters of a single-pu

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18

Goenaga, Igor. "Femtosecond laser ablation for microfluidics." Optical Engineering 44, no. 5 (2005): 051105. http://dx.doi.org/10.1117/1.1902783.

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19

Russo, Richard E., Xianglei Mao, Jhanis J. Gonzalez, and Samuel S. Mao. "Femtosecond laser ablation ICP-MS." J. Anal. At. Spectrom. 17, no. 9 (2002): 1072–75. http://dx.doi.org/10.1039/b202044k.

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20

Alves, S., V. Oliveira, and R. Vilar. "Femtosecond laser ablation of dentin." Journal of Physics D: Applied Physics 45, no. 24 (2012): 245401. http://dx.doi.org/10.1088/0022-3727/45/24/245401.

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21

Okoshi, Masayuki, and Narumi Inoue. "Femtosecond Laser Ablation of Polyethylene." Japanese Journal of Applied Physics 42, Part 2, No.1A/B (2003): L36—L38. http://dx.doi.org/10.1143/jjap.42.l36.

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22

Le, Quang-Tri, Caroline Bertrand, and Rui Vilar. "Femtosecond laser ablation of enamel." Journal of Biomedical Optics 21, no. 6 (2016): 065005. http://dx.doi.org/10.1117/1.jbo.21.6.065005.

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23

Dittrich, Ph, R. Bartlome, G. Montemezzani, and P. Günter. "Femtosecond laser ablation of DAST." Applied Surface Science 220, no. 1-4 (2003): 88–95. http://dx.doi.org/10.1016/s0169-4332(03)00745-1.

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24

Sonntag, S., J. Roth, F. Gaehler, and H. R. Trebin. "Femtosecond laser ablation of aluminium." Applied Surface Science 255, no. 24 (2009): 9742–44. http://dx.doi.org/10.1016/j.apsusc.2009.04.062.

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25

Dumitru, G., V. Romano, H. P. Weber, M. Sentis, and W. Marine. "Femtosecond ablation of ultrahard materials." Applied Physics A: Materials Science & Processing 74, no. 6 (2002): 729–39. http://dx.doi.org/10.1007/s003390101183.

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26

Plech, A., P. Leiderer, and J. Boneberg. "Femtosecond laser near field ablation." Laser & Photonics Review 3, no. 5 (2009): 435–51. http://dx.doi.org/10.1002/lpor.200810044.

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27

K�per, S., and M. Stuke. "Femtosecond uv excimer laser ablation." Applied Physics B Photophysics and Laser Chemistry 44, no. 4 (1987): 199–204. http://dx.doi.org/10.1007/bf00692122.

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28

Struleva, E. V., P. S. Komarov, S. A. Romashevskiy, S. A. Evlashin, and S. I. Ashitkov. "Femtosecond Laser Ablation of Iron." High Temperature 60, S2 (2022): S159—S163. http://dx.doi.org/10.1134/s0018151x21050199.

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29

Kokaj, Agon, Haxhi Kamberi, and Muhamet Kadrija. "Investigation of ablation mechanism for laser-based lithotripsy." Romanian Medical Journal 72, no. 1 (2025): 66–72. https://doi.org/10.37897/rmj.2025.1.14.

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Background. The formation of stones in organs such as the kidneys or gallbladder can lead to serious health problems, traditionally treated through conventional surgery. Laser-based techniques, particularly lithotripsy (known also as ablation), have emerged as promising alternatives due to their potential to be painless, low-cost, and suitable for outpatient procedures. Objectives. This study investigates the mechanism of destruction of kidney or gallbladder stones using femtosecond laser pulses. Specifically, it focuses on understanding how pulsed laser energy contributes to stone ablation. M

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30

Jiang, Lan, and Hai-Lung Tsai. "Energy Transport and Nanostructuring of Dielectrics by Femtosecond Laser Pulse Trains." Journal of Heat Transfer 128, no. 9 (2006): 926–33. http://dx.doi.org/10.1115/1.2241979.

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This study analyzes single burst ablation of dielectrics by a femtosecond pulse train that consists of one or multiple pulses. It is found that (1) there exist constant-ablation-depth zones with respect to fluence for one or multiple pulses per train and (2) for the same total fluence per train, although the ablation depth decreases in multiple pulses as compared to that of a single pulse, the depth of the constant-ablation-depth zone decreases. In other words, repeatable structures at the desired smaller nanoscales can be achieved in dielectrics by using the femtosecond pulse train technology

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31

Portaccio, Marianna, Ines Delfino, Giovanni Maria Gaeta, Umberto Romeo, and Maria Lepore. "Vibrational Spectroscopies for Investigating Structural and Biochemical Modifications Induced in Hard Dental Tissues by Femtosecond Laser Ablation: A Brief Review." Compounds 4, no. 4 (2024): 587–603. http://dx.doi.org/10.3390/compounds4040036.

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In recent years, the femtosecond laser ablation of hard dental tissues has stimulated great interest in preparing accurate and reproducible dental cavities. Many studies on the changes induced in the surface morphology, structure, and composition of human teeth have been performed using various advanced experimental techniques. Vibrational spectroscopies such as Fourier transform infrared (FT-IR) and Raman spectroscopy have been adopted for obtaining precise information about changes induced by femtosecond laser ablation in human teeth. Their two main components, dentin and enamel, have been c

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32

Lasemi, Niusha, Günther Rupprechter, Gerhard Liedl, and Dominik Eder. "Near-Infrared Femtosecond Laser Ablation of Au-Coated Ni: Effect of Organic Fluids and Water on Crater Morphology, Ablation Efficiency and Hydrodynamic Properties of NiAu Nanoparticles." Materials 14, no. 19 (2021): 5544. http://dx.doi.org/10.3390/ma14195544.

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Scanning electron microscopy (SEM) and profilometry of the crater morphology and ablation efficiency upon femtosecond laser ablation of Au-coated Ni targets in various fluids revealed a pronounced dependence on the ablation medium. For ethanol, a sufficient ablation efficiency was obtained, whereas for 2-butanol a higher efficiency indicated stronger laser–target interaction. Hierarchical features in the crater periphery pointed to asymmetrical energy deposition or a residual effect of the Coulomb-explosion-initiating ablation. Significant beam deviation in 2-butanol caused maximum multiple sc

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33

Bischoff, Kay, Dominik Mücke, Gian-Luca Roth, Cemal Esen, and Ralf Hellmann. "UV-Femtosecond-Laser Structuring of Cyclic Olefin Copolymer." Polymers 14, no. 14 (2022): 2962. http://dx.doi.org/10.3390/polym14142962.

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We report on the laser ablation of cyclic olefin copolymer using an amplified ultrashort pulsed laser in the ultraviolet spectral range. In addition to a high ablation depth per laser-structured layer up to 74 μm at a fluence of 22 J cm−2, an excellent mean roughness Ra of laser-patterned surfaces down to 0.5 μm is demonstrated. Furthermore, with increasing fluence, increasing ablation efficiencies up to 2.5 mm3 W−1 min−1 are determined. Regarding the quality of the ablation, we observed steep ablation flanks and low debris formation, though for fluences above 10.5 J cm−2 the formation of trou

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34

Qi, Li Tao, and Jin Ping Hu. "Experimental Investigation on Femtosecond Laser Ablation of Polycarbonate." Advanced Materials Research 652-654 (January 2013): 2359–62. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.2359.

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In this paper, experimental investigations on femtosecond laser (pulse duration:164 fs, wavelength:780 nm) micromachining of polycarbonate have been carried out in air. The lateral and vertical machining precision was evaluated by scanning electron microscopy and profilometer. The morphological changes were observed by scanning electron microscopy. The ablation mechanism varied with the laser pulse energy was discussed. The diameter and depth of the ablated crated are influenced by the laser pulse energy and the number of laser pulses. The relation between the diameter and ablation depth of th

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35

Qi, Li Tao. "Single Femtosecond Laser Pulse Irradiation of Silicon on Different Crystallographic Facet Planes." Advanced Materials Research 314-316 (August 2011): 1885–88. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1885.

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Experiment on ablation of silicon wafer on different crystallographic facet planes by single laser pulse irradiation was carried out with a femtosecond pulsed laser operating at a wavelength of 780 nm and a pulse width of 160 fs. The quality and morphology of the laser ablated silicon surface were evaluated by atomic force microscopy. The ablation threshold fluences on different crystallographic facet planes were obtained through the relationship between the squared diameter of the craters and pulse energy. The effects of different crystallographic facet planes of silicon wafer on the process

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36

Chen, Hong Yun, Zhen Zhu Wan, and Yan Ling Han. "Surface Modification Induced by Femtosecond Laser Pulses in Lithium Niobate." Applied Mechanics and Materials 142 (November 2011): 134–37. http://dx.doi.org/10.4028/www.scientific.net/amm.142.134.

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The interaction between femtoseocnd laser and transparent materials has been studied intensively in recent years. When the femtosecond laser was focused onto the surface of the transparent materials, if the laser fluence applied to the sample exceeds the material’s fluence threshold, ablation occurs. In this paper, we study the surface ablation of lithium niobate by femtosecond laser. We produced a two-dimensional array of voids in the sample surface by varying the number of shots and laser energy, and analyze of the damage depth with the relation to the pulse energy and the number of the puls

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37

Zhou, Weiguo, Keyu Gong, Jie Wan, Lulu Quan, Yuchuan Chu, and Yong Cao. "Molecular dynamics simulation study on ablation of silicon by water-jet-guided laser." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 231, no. 6 (2016): 1217–25. http://dx.doi.org/10.1177/0954408916662088.

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Stillinger–Weber potential and Z-layer energy model were adopted in molecular dynamics simulation to study the ablation of silicon by water-jet-guided femtosecond laser, and comparison was made by ablating silicon with or without water-jet cooling in our simulations. Simulation results indicated that with water-jet cooling, the thermal-affected zone could be reduced in area, and the peak of density could disappear more quickly. It was therefore concluded that water-jet-guided laser could be used to considerably improve the ablation quality of silicon.

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Shaheen, Mohamed E., and Brian J. Fryer. "Femtosecond laser ablation of brass: A study of surface morphology and ablation rate." Laser and Particle Beams 30, no. 3 (2012): 473–79. http://dx.doi.org/10.1017/s0263034612000407.

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AbstractThe interaction of near infrared femtosecond laser pulses with a Cu based alloy (brass) in ambient air at atmospheric pressure and under different laser conditions was investigated. The effects of laser fluence and number of pulses on surface morphology and ablation rate were studied using scanning electron microscopy (SEM) and optical microscopy. Ablation rates were found to rapidly increase from 83 to 604 nm/pulse in the fluence range 1.14–12.21 J/cm2. At fluence >12.21 J/cm2, ablation rates increased slowly to a maximum (607 nm/pulse at 19.14 J/cm2), and then decreased at fluence

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Senadheera, Sid, Bo Tan, and Krishnan Venkatakrishnan. "Critical Time to Nucleation: Graphite and Silicon Nanoparticle Generation by Laser Ablation." Journal of Nanotechnology 2009 (2009): 1–6. http://dx.doi.org/10.1155/2009/590763.

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Femtosecond laser ablation hydrodynamics has been analyzed numerically. The nucleation process of two materials (silicon and graphite) in an expanding plume produced by a femtosecond laser ablation is analyzed within the framework of the Zeldovich-Raizer theory (RZ theory). RZ theory is the most appropriate theory applicable to an expanding plume created by a femtosecond laser ablation and has been used to estimate the critical times in the evolution of nanoparticle formation. However, there is no experimental result to directly substantiate the theoretical model on a fundamental level. This p

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40

Zhang, Lei, Xiao Wen Cao, Shun Guang Li, Ru Yi Xiang, and Hui Chao Sun. "Investigation of Femtosecond Laser Ablation Threshold for Nickel Template." Applied Mechanics and Materials 633-634 (September 2014): 665–70. http://dx.doi.org/10.4028/www.scientific.net/amm.633-634.665.

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This paper presents a theoretical and experimental investigation into the ablation threshold of nickel template by femtosecond laser in air at atmospheric pressure. The laser pulses used for the study are 800 nm in wavelength, 100fs in pulse duration, and 1KHz in repetition rate. The two-temperature model is used to predict the single-pulse ablation threshold for nickel theoretically. Micro-hole ablation experiments are carried out in air by focusing the femtosecond laser beam on the nickel target surface at normal incidence with the long-focus objective lens of enlargement factor 50 and NA=0.

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41

Song, Jichao, and Jingya Sun. "Femtosecond Laser Fabrication and Ultrafast Dynamics Study on FTO Film." Journal of Physics: Conference Series 2356, no. 1 (2022): 012018. http://dx.doi.org/10.1088/1742-6596/2356/1/012018.

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Transparent conductive oxides (TCO) are widely used in optoelectronic devices due to their high visible light transmittance and high electrical conductivity. Fabricating micro-nano structures on TCO films with femtosecond lasers can further enhance their optoelectronic properties. However, most of the existing researches on femtosecond laser processing of TCO films focus on materials such as indium tin oxide (ITO) and ZnO, and the research on fluorine-doped tin oxide (FTO) is still insufficient. In this paper, the ablation rules of FTO film irradiated by femtosecond laser is studied in detail.

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Wang, Lukang, You Zhao, Yu Yang, Manman Zhang, and Yulong Zhao. "Experimental Investigation on Ablation of 4H-SiC by Infrared Femtosecond Laser." Micromachines 13, no. 8 (2022): 1291. http://dx.doi.org/10.3390/mi13081291.

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Femtosecond laser ablation has become one of the important structural processing methods for the third-generation semiconductor material, silicon carbide (SiC), and it is gradually being employed in the manufacture of microelectromechanical systems and microelectronic devices. Experimental study has been performed on infrared single and multiple pulses (1035 nm) femtosecond laser ablation of SiC at various processing parameters. Diameters of laser ablation spots on 4H-SiC were measured to estimate the absorption threshold for material modification and structural transformation, which were 2.35

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Fang, Ranran, Duanming Zhang, Hua Wei, Zhihua Li, Fengxia Yang, and Yihua Gao. "Improved two-temperature model and its application in femtosecond laser ablation of metal target." Laser and Particle Beams 28, no. 1 (2010): 157–64. http://dx.doi.org/10.1017/s0263034610000030.

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AbstractAn improved two-temperature model to describe femtosecond laser ablation of metal target was presented. The temperature-dependent heat capacity and thermal conductivity of the electron, as well as electron temperature-dependent absorption coefficient and absorptivity are all considered in this two-temperature model. The tailored two-temperature model is solved using a finite difference method for copper target. The time-dependence of lattice and electron temperature of the surface for different laser fluence are performed, respectively. The temperature distribution of the electron and

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Liu, Yi-Hsien, and Chung-Wei Cheng. "The Experimental and Modeling Study of Femtosecond Laser-Ablated Silicon Surface." Journal of Manufacturing and Materials Processing 7, no. 2 (2023): 68. http://dx.doi.org/10.3390/jmmp7020068.

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In this study, monocrystalline silicon was ablated by a single 1030 nm femtosecond laser pulse. Variable laser fluence (0.16–3.06 J/cm2) was used, and two ablation thresholds (0.8 and 1.67 J/cm2) were determined experimentally. A two-temperature model was established based on the dynamic optical model, the carrier density model, and the phase explosion model for comparison with experimental results. The melting (0.25 J/cm2) and vaporization (0.80 J/cm2) thresholds were determined when the lattice temperature reached melting and boiling points, so as to overcome the latent heat. Finally, the ab

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Cai, Xintian, Chaoyue Ji, Changkai Li, et al. "Multiphoton Absorption Simulation of Sapphire Substrate under the Action of Femtosecond Laser for Larger Density of Pattern-Related Process Windows." Micromachines 12, no. 12 (2021): 1571. http://dx.doi.org/10.3390/mi12121571.

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It is essential to develop pattern-related process windows on substrate surface for reducing the dislocation density of wide bandgap semiconductor film growth. For extremely high instantaneous intensity and excellent photon absorption rate, femtosecond lasers are currently being increasingly adopted. However, the mechanism of the femtosecond laser developing pattern-related process windows on the substrate remains to be further revealed. In this paper, a model is established based on the Fokker–Planck equation and the two-temperature model (TTM) equation to simulate the ablation of a sapphire

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Wei, Hui Li, Feng Mao, Xin Yu Tan, et al. "The Influence of DOS Effects on Ablation Properties in High Energy Femtosecond Laser Ablation Process." Materials Science Forum 689 (June 2011): 11–15. http://dx.doi.org/10.4028/www.scientific.net/msf.689.11.

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The numerical simulation of high-energy femtosecond laser ablation on metal target is studied in this paper. Based on the two-temperature model (TTM), a new model considering the effects of the electron density of states (DOS) on electronic heat capacity, electron-phonon coupling coefficient and electronic thermal conductivity is established. As an example of gold target, the relationship between the melting threshold and the thickness of gold films is numerically calculated. Our result is more consistent with the experimental datum in contrast to the results without considering the DOS effect

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Abdelmalek, Ahmed, Zeyneb Bedrane, and El-Hachemi Amara. "Modeling for Copper Ablation by Ultrashort Laser Bursts-Train." Journal of Modeling and Optimization 11, no. 1 (2019): 30–35. http://dx.doi.org/10.32732/jmo.2019.11.1.30.

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Ablation of copper using multipulse femtosecond laser irradiation with an 800 nm wavelength and 900-fs pulse duration is investigated theoretically using a dynamic tow temperature model. Our results show that the irradiation of a metal film by burst femtosecond laser with a separation time between pulses less than the thermal relaxation time can dramatically enhance the irradiated focal volume without a significant dissipation of the energy inside the material. We demonstrate the advantage of burst irradiation at low fluence where the cooper can be ablated below single ablation threshold. We a

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Nagashima, Kengo, Masaki Hashida, Masahito Katto, Masahiro Tsukamoto, Masayuki Fujita, and Yasukazu Izawa. "Femtosecond Laser Ablation of Al2O3 ceramics." IEEJ Transactions on Electronics, Information and Systems 124, no. 2 (2004): 388–92. http://dx.doi.org/10.1541/ieejeiss.124.388.

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Groenendijk, Max, and Johan Meijer. "Microstructuring using femtosecond pulsed laser ablation." Journal of Laser Applications 18, no. 3 (2006): 227–35. http://dx.doi.org/10.2351/1.2227020.

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McCaughey, Ryan G., Hui Sun, Vanessa S. Rothholtz, Tibor Juhasz, and Brian J. F. Wong. "Femtosecond laser ablation of the stapes." Journal of Biomedical Optics 14, no. 2 (2009): 024040. http://dx.doi.org/10.1117/1.3120490.

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