Phase change mechanisms during femtosecond laser pulse train ablation of nickel thin films

Li, Xin; Jiang, Lan; Tsai, Hai-Lung

doi:10.1063/1.3223331

Cited by 29 publications

(17 citation statements)

References 31 publications

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“…With 50 fs pulses, the total plasma intensity with double pulses of 20 µJ (220 µJ) was 100 times higher than the one with a single pulse of the same pulse energy (120 µJ), and 50 times higher than the one with a single pulse but with a doubled pulse energy (140 µJ). Our observations on ultrashort double pulse ablation have been confirmed in similar studies in [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

Section: Introductionsupporting

confidence: 77%

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Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Semerok¹,

Dutouquet²

2014

Spectrochimica Acta Part B: Atomic Spectroscopy

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To cite this version:A. Semerok, Christophe Dutouquet. Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet : A comparative study. Spectrochimica Acta Part B: Atomic Spectroscopy, Elsevier, 2014Elsevier, , 99, pp.163-171. 10.1016Elsevier, /j.sab.2014 A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT Abstract.Ultrashort pulse laser microablation coupled with optical emission spectroscopy was under study to obtain several micro-LIBS analytical features (shot-to-shot reproducibility, spectral line intensity and lifetime, calibration curves, detection limits). Laser microablation of Al matrix samples with known Cu-and Mg-concentrations was performed by single and double pulses of 50 fs and 1 ps pulse duration in air and with Ar-jet.The micro-LIBS analytical features obtained under different experimental conditions were characterized and compared. The highest shot-to-shot reproducibility and gain in plasma spectral line intensity were obtained with double pulses with Ar-jet for both 50 fs and 1 ps pulse durations. The best calibration curves were obtained with 1ps pulse duration with Ar-jet. Micro-LIBS with ultrashort double pulses may find its effective application for surface elemental microcartography.

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Section: Introductionsupporting

confidence: 77%

“…The analysis of our results and those obtained in [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] has revealed the fundamental role of the electron-lattice relaxation time ( el .  1-10 ps) for laser ablation regime and the resulting double pulse LIBS-features.…”

Section: Discussionmentioning

confidence: 99%

Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Semerok¹,

Dutouquet²

2014

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…This we hypothesize initiates the change of phase from tetragonal structure of the tin target to hexagonal phase of the prepared stanene samples. Even though several studies are available on understanding these complex ablation process at different time scales 11 undergoing phase transformations 12 and producing different morphologies 13 , exact reaction process is still not understood and requires further investigations. This process is different from the oxide nano-particle formation using nano-second lasers in which no change of lattice is observed 14 .…”

Section: Resultsmentioning

confidence: 99%

Stanene: Atomically Thick Free-standing Layer of 2D Hexagonal Tin

Saxena

Chaudhary

Shukla

2016

Sci Rep

153

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Stanene is one of most important of 2D materials due to its potential to demonstrate room temperature topological effects due to opening of spin-orbit gap. In this pursuit we report synthesis and investigation of optical properties of stanene up to few layers, a two-dimensional hexagonal structural analogue of graphene. Atomic scale morphological and elemental characterization using HRTEM equipped with SAED and EDAX detectors confirm the presence of hexagonal lattice of Sn atoms. The position of Raman peak along with the inter-planar ‘d’ spacing obtained from SAED for prepared samples are in good agreement with that obtained from first principles calculations and confirm that the sheets are not (111) α-Sn sheets. Further, the optical signature calculated using density functional theory at ~191 nm and ~233 nm for low buckled stanene are in qualitative agreement with the measured UV-Vis absorption spectrum. AFM measurements suggest interlayer spacing of ~0.33 nm in good agreement with that reported for epitaxial stanene sheets. No traces of oxygen were observed in the EDAX spectrum suggesting the absence of any oxidized phases. This is also confirmed by Raman measurements by comparing with oxidized stanene sheets.

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“…When the laser pulse energy was high, the increasing number of pulses made more energy deposited on the inner wall, thus accelerating the ablation of the material and eventually forming a through hole. At the same total fluence of a laser, multi-pulse ablation can reduce the compressive stress and tensile stress at the ablation position of film [27]. A laser can easily cause air to breakdown near the processed micro holes to form atmospheric plasma, and the laser intensity gradually decreases with the direction of the beam propagation.…”

Section: Mechanisms Of Femtosecond Laser Ablation Of Cnt Filmmentioning

confidence: 99%

Ablation and Patterning of Carbon Nanotube Film by Femtosecond Laser Irradiation

Yin

2019

Applied Sciences

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Carbon nanotube (CNT) film can be used as thin film electrodes and wearable electronic devices due to their excellent mechanical and electrical properties. The femtosecond laser has the characteristics of an ultra-short pulse duration and an ultra-high peak power, and it is one of the most suitable methods for film material processing. The ablation and patterning of CNT film are performed by a femtosecond laser with different parameters. An ablation threshold of 25 mJ/cm2 was obtained by investigating the effects of laser pulse energy and pulse number on ablation holes. Raman spectroscopy and scanning electron microscope (SEM) were used to characterize the performance of the pattern groove. The results show that the oligomer in the CNT film was removed by the laser ablation, resulting in an increase in Raman G band intensity. As the laser increased, the ablation of the CNTs was caused by the energy of photons interacting with laser-induced thermal elasticity when the pulse energy was increased enough to destroy the carbon–carbon bonds between different carbon atoms. Impurities and amorphous carbon were found at and near the cut edge while laser cutting at high energy, and considerable distortion and tensile was produced on the edge of the CNTs’ groove. Furthermore, appropriate cutting parameters were obtained without introducing defects and damage to the substrate, which provides a practical method applied to large-area patterning machining of CNT film.

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Phase change mechanisms during femtosecond laser pulse train ablation of nickel thin films

Cited by 29 publications

References 31 publications

Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Stanene: Atomically Thick Free-standing Layer of 2D Hexagonal Tin

Ablation and Patterning of Carbon Nanotube Film by Femtosecond Laser Irradiation

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