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Journal articles on the topic 'Ultra-short pulse laser'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

ABDULRAHMAN, Hayder J., and Suzan B. MOHAMMED. "DEVELOPMENT OF ULTRA-SHORT HIGH INTENSITY LASERS FOR THE VISIBLE SPECTRA RANGE." Periódico Tchê Química 17, no. 35 (2020): 739–52. http://dx.doi.org/10.52571/ptq.v17.n35.2020.63_abdulrahman_pgs_739_752.pdf.

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Ultra-short laser pulses are particularly suitable for processing micro tools made of ultra-hard and dielectric materials. Ultra-short laser pulses provide a contact-free and precise fabrication of heat-sensitive materials such as visible spectra range. Visible spectra range has unique properties, which makes it an essential material in the tool, jewelry, and semiconductor industries. The processing of visible spectra range by ultra-short laser pulses is complex, as visible and near-infrared light is generally not absorbed. However, the intensity of ultra-short laser pulses is extremely high,

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2

Jäggi, Beat, Daniel J. Förster, Rudolf Weber, and Beat Neuenschwander. "Residual heat during laser ablation of metals with bursts of ultra-short pulses." Advanced Optical Technologies 7, no. 3 (2018): 175–82. http://dx.doi.org/10.1515/aot-2018-0003.

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Abstract The usage of pulse bursts allows increasing the throughput, which still represents a key factor for machining with ultra-short pulsed lasers. The influence of the number of pulses within a burst on the specific removal rate is investigated for copper and stainless steel. Furthermore, calorimetric measurements were performed to estimate the residual energy coefficient as well as the absorptance of machined surfaces for copper to explain the reduced specific removal rate for a 2-pulse burst and the similar or even higher rate for a 3-pulse burst compared to single pulse ablation. Based

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3

Badziak, J., and J. Domański. "Towards ultra-intense ultra-short ion beams driven by a multi-PW laser." Laser and Particle Beams 37, no. 03 (2019): 288–300. http://dx.doi.org/10.1017/s0263034619000533.

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AbstractThe multi-petawatt (PW) lasers currently being built in Europe as part of the Extreme Light Infrastructure (ELI) project will be capable of generating femtosecond light pulses of ultra-relativistic intensities (~1023–1024 W/cm2) that have been unattainable so far. Such laser pulses can be used for the production of high-energy ion beams with unique features that could be applied in various fields of scientific and technological research. In this paper, the prospect of producing ultra-intense (intensity ≥1020 W/cm2) ultra-short (pico- or femtosecond) high-energy ion beams using multi-PW

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4

TSUKAMOTO, Masahiro. "Ultra-short pulse laser material processing." Journal of the Japan Welding Society 73, no. 4 (2004): 260–61. http://dx.doi.org/10.2207/qjjws1943.73.260.

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Laskovnev, A. P., M. I. Markevich, A. N. Malyshko, V. I. Zhuravleva, and A. M. Chaplanov. "Formation of colloidal solutions of silicon nanoparticles in ethyl alcohol with ultra-short laser pulses." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 66, no. 1 (2021): 7–11. http://dx.doi.org/10.29235/1561-8358-2021-66-1-7-11.

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The study of surface morphology of a silicon target after laser exposure, the formation and study of nanoparticles, obtained by laser ablation by ultrashort infrared pulses, were conducted. The material was processed using a yttrium aluminum garnet laser (LS-2134D) with a wavelength of 1064 nm, generating in a two-pulse mode (pulses are separated by a time interval of 3 μs, pulse duration is 10 ns, pulse repetition rate is 10 Hz, single pulse energy ~ 0.05 J). Alcohol solutions of silicon nanoparticles were obtained by laser ablation. It is shown that an ensemble of particles of different size

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Mounir, Khelladi. "ANALYSIS OF ULTRAHSORT LASER PULSES PROPAGATION IN MEDIUM: LITHARGE GLASS SF56A." International Journal of Research -GRANTHAALAYAH 7, no. 2 (2019): 58–67. http://dx.doi.org/10.29121/granthaalayah.v7.i2.2019.994.

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Propagation of an ultra-short lasers pulses in a linear optical medium consisting of free space, dispersive media. However, analytical methods have the limitations of not being able to handle arbitrary pulse profiles. Also, closed form solutions are often obtained after certain levels of approximations. This has motive a few studies based on the use of numerical simulation techniques in the analysis of pulse propagation. In view of the recent advance in ultra-short pulse propagation, a strong need is felt for developing a numerical formalism capable of performing such a complete analysis of th

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De Bonis, Angela, and Roberto Teghil. "Ultra-Short Pulsed Laser Deposition of Oxides, Borides and Carbides of Transition Elements." Coatings 10, no. 5 (2020): 501. http://dx.doi.org/10.3390/coatings10050501.

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Oxides, borides and carbides of the transition elements are materials of great interest from a technologic point of view. Many of these materials are used in the form of thin films, so several techniques are commonly used to deposit them. Among these techniques, Pulsed Laser Deposition (PLD) performed using ultra-short pulse lasers, mainly fs lasers, presents unique characteristics in respect to PLD performed using conventional short pulse lasers. Indeed, the films deposited using fs PLD are often nanostructured, and this technique often allows the target stoichiometry to be transferred to the

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8

Zhao, Man, and Chang Zhao. "The Influences of Turbid Media on the Optical Property of Different Ultra Short Gauss Pulse." Materials Science Forum 663-665 (November 2010): 296–99. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.296.

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Based on the diffusion approximation theory, when the laser pulse transmitting through the turbid media, its energy will be attenuated and the pulse shape will be changed by the scattering and absorption. In this paper, Mathematics equations of the ultra short Gauss laser pulse in different pulse width tp are given, the reflective pulses with the boundary condition of semi-infinite homogeneous media are discussed. We get the simulation results of reflective intensity and the reflective pulse shape of different tp based on the diffusion equation. From the results, we know that the ultra short G

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9

Oh, Myoung-Ku, and Ki-Young Kim. "Micro Application with Ultra Short Pulse Laser." Journal of the Korean Welding and Joining Society 26, no. 4 (2008): 38–40. http://dx.doi.org/10.5781/kwjs.2008.26.4.038.

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10

Blau, J., R. K. Wong, and W. B. Colson. "Ultra-short pulse free electron laser oscillators." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 358, no. 1-3 (1995): 441–43. http://dx.doi.org/10.1016/0168-9002(94)01270-9.

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11

LEE, C. C., T. R. SCHIBLI, G. ACOSTA, and J. S. BUNCH. "ULTRA-SHORT OPTICAL PULSE GENERATION WITH SINGLE-LAYER GRAPHENE." Journal of Nonlinear Optical Physics & Materials 19, no. 04 (2010): 767–71. http://dx.doi.org/10.1142/s021886351000573x.

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Pulses as short as 260 fs have been generated in a diode-pumped low-gain Er:Yb: glass laser by exploiting the nonlinear optical response of single-layer graphene. The application of this novel material to solid-state bulk lasers opens up a way to compact and robust lasers with ultrahigh repetition rates.

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12

Kiriyama, Hiromitsu, Alexander S. Pirozhkov, Mamiko Nishiuchi, et al. "Petawatt Femtosecond Laser Pulses from Titanium-Doped Sapphire Crystal." Crystals 10, no. 9 (2020): 783. http://dx.doi.org/10.3390/cryst10090783.

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Ultra-high intensity femtosecond lasers have now become excellent scientific tools for the study of extreme material states in small-scale laboratory settings. The invention of chirped-pulse amplification (CPA) combined with titanium-doped sapphire (Ti:sapphire) crystals have enabled realization of such lasers. The pursuit of ultra-high intensity science and applications is driving worldwide development of new capabilities. A petawatt (PW = 1015 W), femtosecond (fs = 10−15 s), repetitive (0.1 Hz), high beam quality J-KAREN-P (Japan Kansai Advanced Relativistic ENgineering Petawatt) Ti:sapphire

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WANG, WEI-MIN, ZHENG-MING SHENG, SHIGEO KAWATA, et al. "Towards Sub-TeV electron beams driven by ultra-short, ultra-intense laser pulses." Journal of Plasma Physics 78, no. 4 (2012): 461–68. http://dx.doi.org/10.1017/s002237781200044x.

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AbstractEnergetic electron beam generation from a thin foil target by the ponderomotive force of an ultra-intense circularly polarized laser pulse is investigated. Two-dimensional particle-in-cell (PIC) simulations show that laser pulses with intensity of 1022–1023 Wcm−2 generate about 1–10 GeV electron beams, in agreement with the prediction of one-dimensional theory. When the laser intensity is at 1024–1025 Wcm−2, the beam energy obtained from PIC simulations is lower than the values predicted by the theory. The radiation damping effect is considered, which is found to become important for t

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ANWAR, MUHAMMAD SHAHBAZ, ANWAR LATIF, M. IQBAL, M. SHAHID RAFIQUE, M. KHALEEQ-UR-RAHMAN, and SOFIA SIDDIQUE. "Theoretical model for heat conduction in metals during interaction with ultra short laser pulse." Laser and Particle Beams 24, no. 3 (2006): 347–53. http://dx.doi.org/10.1017/s0263034606060502.

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Theoretical studies have been performed on the interaction of short laser pulse with metals. The results of the theoretical model indicate that heat conduction would not be uniform from focal spot or crater at the surface of target metal, when an ultra short laser will interact with the metal. The electromagnetic radiations of laser induce electric field inside the target that is responsible for the induction of current density, which causes electronic heat conduction in the direction of current density. Such an effect is dominant for laser pulse having duration less than of the order of sub-p

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15

Rathore, R., V. Arora, H. Singhal, T. Mandal, J. A. Chakera та P. A. Naik. "Experimental and numerical study of ultra-short laser-produced collimated Cu Kα X-ray source". Laser and Particle Beams 35, № 3 (2017): 442–49. http://dx.doi.org/10.1017/s026303461700043x.

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AbstractKα X-ray sources generated from the interaction of ultra-short laser pulses with solids are compact and low-cost source of ultra-short quasi-monochromatic X-rays compared with synchrotron radiation source. Development of collimated ultra-short Kα X-ray source by the interaction of 45 fs Ti:sapphire laser pulse with Cu wire target is presented in this paper. A study of the Kα source with laser parameters such as energy and pulse duration was carried out. The observed Kα X-ray photon flux was ~2.7 × 108 photons/shot at the laser intensity of ~2.8 × 1017 W cm−2. A model was developed to a

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16

Setsuhara, Yuichi, and Masaki Hashida. "Nano-Surface Modification of Silicon with Ultra-Short Pulse Laser Process." Key Engineering Materials 470 (February 2011): 117–22. http://dx.doi.org/10.4028/www.scientific.net/kem.470.117.

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An ultra-short pulse laser process is presented that is based on a photon-induced phonon excitation process for low-temperature nano-surface modification of silicon. The present methodology is based on the concept that the energy required for re-crystallization and activation of the implanted dopants is supplied to the dopant layer via a nonequilibrium adiabatic process induced by ultra-short pulse laser irradiation at room temperature. An ultra-short pulse laser beam with a pulse duration of ~ 100 femtoseconds has been used in the present work for the investigation of surface excitation featu

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17

Sasaki, Akira. "Modeling of ultra-short-pulse laser pumped X-ray lasers." Journal of Quantitative Spectroscopy and Radiative Transfer 58, no. 4-6 (1997): 879–85. http://dx.doi.org/10.1016/s0022-4073(97)00094-0.

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18

André, Jean-Michel, and Philippe Jonnard. "Ultra-short and ultra-intense X-ray free-electron laser single pulse in one-dimensional photonic crystals." Journal of Synchrotron Radiation 24, no. 2 (2017): 376–85. http://dx.doi.org/10.1107/s1600577517000820.

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The propagation within a one-dimensional photonic crystal of a single ultra-short and ultra-intense pulse delivered by an X-ray free-electron laser is analysed with the framework of the time-dependent coupled-wave theory in non-linear media. It is shown that the reflection and the transmission of an ultra-short pulse present a transient period conditioned by the extinction length and also the thickness of the structure for transmission. For ultra-intense pulses, non-linear effects are expected: they could give rise to numerous phenomena, bi-stability, self-induced transparency, gap solitons, s

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19

Conrad, Daniel, and Lars Richter. "Ultra-short Pulse Laser Structuring of Molding Tools." Physics Procedia 56 (2014): 1041–46. http://dx.doi.org/10.1016/j.phpro.2014.08.016.

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20

Feit, M. D., A. M. Komashko, and A. M. Rubenchik. "Ultra-short pulse laser interaction with transparent dielectrics." Applied Physics A 79, no. 7 (2004): 1657–61. http://dx.doi.org/10.1007/s00339-004-2683-1.

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21

Varmazyar, Parvin, Saeed Mirzanejhad, and Taghi Mohsenpour. "Effect of pre-plasma on the ion acceleration by intense ultra-short laser pulses." Laser and Particle Beams 36, no. 2 (2018): 226–31. http://dx.doi.org/10.1017/s0263034618000241.

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AbstractIn the interaction of short-laser pulses with a solid density target, pre-plasma can play a major role in ion acceleration processes. So far, complete analysis of pre-plasma effect on the ion acceleration by ultra-short laser pulses in the radiation pressure acceleration (RPA) regime has been unknown. Then the effect of pre-plasma on the ion acceleration efficiency is analyzed by numerical results of the particle-in-cell simulation in the RPA regime. It is shown that, for long-laser pulses (τp > 50 fs), the presence of pre-plasma makes a destructive effect on ion acceleration while

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22

Ionel, L., and D. Ursescu. "Spatial extension of the electromagnetic field from tightly focused ultra-short laser pulses." Laser and Particle Beams 32, no. 1 (2014): 89–97. http://dx.doi.org/10.1017/s0263034613000906.

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AbstractIt is shown that in the focus of ultra-short pulses of duration t, the equivalent relation s = ct, where c is the speed of light and s the spatial extent of the pulse of the collimated pulse, does not hold. While the duration of one pulse is constant and independent of the measurement point, the spatial extension of the ultra-short pulse can be spatially shorter a factor more than 10 compared to the one obtained from the usual relation. The result is explained in correspondence with the extension of the Rayleigh range. Few femtosecond long gamma bursts can thus be generated in Thomson

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23

SCHMIDT, M., P. D'OLIVEIRA, P. MEYNADIER, D. NORMAND, and C. CORNAGGIA. "STRONG LASER FIELD INTERACTION WITH DIATOMIC MOLECULES: FROM THE ULTRA-SHORT TO LONG-PULSE REGIME." Journal of Nonlinear Optical Physics & Materials 04, no. 04 (1995): 817–29. http://dx.doi.org/10.1142/s0218863595000367.

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In the present paper, we compare novel MEDI results on iodine obtained with 30 ps laser pulses to those obtained in the femtosecond regime. The results indicate laser-induced trapping of the molecules not only in the ultra-short pulse regime, but also for the long pulses, since the fragment kinetic energy releases are essentially the same, although the pulse duration is varied over more than two orders of magnitude. Most interestingly, with 30 ps pulses significant post-dissociation ionization of the In+-fragments observed for the first time, proving that near-Coulomb energies and post-dissoci

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24

Hatada, Keisuke, and Andrea Di Cicco. "Saturation phenomena for ultra short Free Electron Laser pulses." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C126. http://dx.doi.org/10.1107/s2053273314098738.

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Saturable absorption was recently observed in transmission measurements above the LII,III edge of pure Al thin films using ultra short x-ray pulses at a free-electron-laser (FEL) facility . [1] The high fluence reachable by FEL pulses, the shortness of the pulse duration, and the typical lifetime of the excited state, are all important factors enabling observation of the phenomenon. We devised a simplified theoretical model describing the saturation phenomenon using a three- channel model containing ground, excited and relaxed states. This phenomenological model explicitly includes the interac

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25

KANAPATHIPILLAI, M. "Nonlinear absorption of ultra short laser pulses by clusters." Laser and Particle Beams 24, no. 1 (2006): 9–14. http://dx.doi.org/10.1017/s0263034606060034.

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Very good absorption of ultra short laser pulses by clusters is a well established fact. Efficient collisional absorption occurs only in the initial phase of the pulse. However, experiments and numerical simulations show that even after collisional absorption becomes inefficient subsequent to heating of the electrons, strong absorption continues. There have been a few attempts to model this phenomenon in terms of driven “linear” oscillator models with time dependent eigen-frequencies. Here we propose a nonlinear oscillator model and show that nonlinear resonance is the leading mechanism respon

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26

Tyutyunnik, Vyacheslav M. "Generation of high-intensity ultra-short optical pulses: 2018 Nobel Prize Winners in Physics Gerard Mourou and Donna Strickland." Image Journal of Advanced Materials and Technologies 6, no. 2 (2021): 087–90. http://dx.doi.org/10.17277/jamt.2021.02.pp.087-090.

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In the early 1980s, French physicist G. Mourou and his Canadian collaborator D. Strickland solved the problem of power drop by dispersing in time and space the processes of amplification and compression: a method of obtaining super-powerful chirped laser pulses (CPA – chirped pulse amplification). The paper presents brief biographical references to Mourou and Strickland. The 2018 Nobel Prize in Physics was awarded “for groundbreaking inventions in the field of laser physics”: Artur Isidorovich Ashkin (Ashkinazi, born 02.09.1922, USA), half of the prize “for the optical tweezers and their appli

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Priebe, G., D. Laundy, M. A. Macdonald, et al. "Inverse Compton backscattering source driven by the multi-10 TW laser installed at Daresbury." Laser and Particle Beams 26, no. 4 (2008): 649–60. http://dx.doi.org/10.1017/s0263034608000700.

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AbstractInverse Compton scattering is a promising method to implement a high brightness, ultra-short, energy tunable X-ray source at accelerator facilities. We have developed an inverse Compton backscattering X-ray source driven by the multi-10 TW laser installed at Daresbury. Hard X-rays, with spectral peaks ranging from 15 to 30 keV, depending on the scattering geometry, will be generated through the interaction of laser pulses with electron bunches delivered by the energy recovery linac machine, initially known as energy recovery linac prototype and subsequently renamed accelerators and las

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28

Yang, Y., J. Jiao, C. Tian, et al. "Near-microcoulomb multi-MeV electrons generation in laser-driven self-formed plasma channel." Laser and Particle Beams 35, no. 3 (2017): 476–82. http://dx.doi.org/10.1017/s0263034617000490.

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AbstractThe origin and characteristics of near-microcoulomb multi-MeV electrons accelerated by short pulse lasers interacting with near-critical density plasma in self-formed channels are studied using three-dimensional particle-in-cell simulations. According to the analysis on interaction phenomena and electron dynamics, the dominant mechanism turns out to be direct laser acceleration, which ensures the outstanding energy coupling. Additionally, self-channeling is found to be a decisive factor for the acceleration performance, as electrons obtain ultra-high energy through betatron resonance i

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29

Khos-Ochir, Tsogvoo, Purevdorj Munkhbaatar, Tsermaa Baatarchuluun, et al. "Femtosecond Pump Probe Spectroscopy Implementation for Semiconductors." Solid State Phenomena 288 (March 2019): 148–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.288.148.

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Two different pump-probe (PP) setups were developed successfully with different femtosecond pulse lasers. Using a PP setup with an ultra-short pulse laser, the excitation of coherent phonons in GaAs was measured for a calibration and an accuracy test of the developed setup. The frequencies of the coherent phonon modes were in good agreement with reported values [1, 2]. The setups for ZnSe and GaAs were transmission and reflection–type, respectively. When using the ultra-short pulse laser, the signal in the PP experiment was measured by a balanced photo diode.In the other PP experimental setup,

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30

BATANI, DIMITRI. "Transport in dense matter of relativistic electrons produced in ultra-high-intensity laser interactions." Laser and Particle Beams 20, no. 2 (2002): 321–36. http://dx.doi.org/10.1017/s0263034602202244.

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The paper reviews and analyses the experiments devoted to the propagation in dense matter of fast electrons produced in the interaction of short-pulse ultra-high-intensity laser pulses with solid density targets.

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Kronenberg, P., and O. Traxer. "1035 Ultra-short, short, medium and long-pulse laser lithotripsy performance." European Urology Supplements 15, no. 3 (2016): e1035. http://dx.doi.org/10.1016/s1569-9056(16)61036-9.

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YONEDA, Hitoki, Hidetoshi MORIKAMI, Ken-ichi UEDA, and Richard M. MORE. "Optical Constants of Ultra-Short-Pulse Laser Heated Metal." Journal of Plasma and Fusion Research 79, no. 5 (2003): 449–51. http://dx.doi.org/10.1585/jspf.79.449.

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33

Campbell, E. E. B., D. Ashkenasi, and A. Rosenfeld. "Ultra-Short-Pulse Laser Irradiation and Ablation of Dielectrics." Materials Science Forum 301 (January 1999): 123–44. http://dx.doi.org/10.4028/www.scientific.net/msf.301.123.

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Chériaux, Gilles, and Jean-Paul Chambaret. "Ultra-short high-intensity laser pulse generation and amplification." Measurement Science and Technology 19, no. 12 (2008): 129801. http://dx.doi.org/10.1088/0957-0233/19/12/129801.

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Chériaux, Gilles, and Jean-Paul Chambaret. "Ultra-short high-intensity laser pulse generation and amplification." Measurement Science and Technology 12, no. 11 (2001): 1769–76. http://dx.doi.org/10.1088/0957-0233/12/11/303.

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OHMURA, Etsuji. "Molecular Dynamics Simulation of Ultra-Short Pulse Laser Ablation." Journal of the Society of Mechanical Engineers 110, no. 1068 (2007): 844–46. http://dx.doi.org/10.1299/jsmemag.110.1068_844.

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37

Roth, Markus. "The diagnostics of ultra-short pulse laser-produced plasma." Journal of Instrumentation 6, no. 09 (2011): R09001. http://dx.doi.org/10.1088/1748-0221/6/09/r09001.

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YAGUCHI, Yuta, Libo ZHOU, and Hiroshi EDA. "Research on device fabrication using ultra short pulse laser." Proceedings of Ibaraki District Conference 2003 (2003): 171–72. http://dx.doi.org/10.1299/jsmeibaraki.2003.171.

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Grigoryev, S. Yu, S. A. Dyachkov, V. A. Khokhlov, V. V. Zhakhovsky, A. N. Parshikov, and N. A. Inogamov. "Liquid tin droplet fragmentation by ultra-short laser pulse." Journal of Physics: Conference Series 1147 (January 2019): 012067. http://dx.doi.org/10.1088/1742-6596/1147/1/012067.

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Škorić, M. M., Lj Nikolić, Lj Hadžievski, S. Ishiguro, and K. Mima. "Ultra-short photon pulse generation in relativistic laser-plasmas." Physica Scripta T149 (April 27, 2012): 014081. http://dx.doi.org/10.1088/0031-8949/2012/t149/014081.

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41

Hall, T. A., and L. M. Newell. "Ultra-short pulse filamentation in a laser-produced plasma." Optics Communications 70, no. 3 (1989): 213–17. http://dx.doi.org/10.1016/0030-4018(89)90067-9.

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Mincuzzi, G., L. Gemini, M. Faucon, and R. Kling. "Extending ultra-short pulse laser texturing over large area." Applied Surface Science 386 (November 2016): 65–71. http://dx.doi.org/10.1016/j.apsusc.2016.05.172.

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Smith, C., B. H. Christensen, J. Chevallier, and P. Balling. "Metallic nanosieves formed by ultra-short-pulse laser ablation." Applied Surface Science 255, no. 7 (2009): 4246–49. http://dx.doi.org/10.1016/j.apsusc.2008.11.016.

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Whittle, G. L., A. Calka, A. P. Radliński, and B. Luther-Davies. "Ultra short pulse laser annealing of FeB metallic glasses." Journal of Magnetism and Magnetic Materials 50, no. 3 (1985): 278–86. http://dx.doi.org/10.1016/0304-8853(85)90063-0.

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45

Fortmann-Grote, Carsten, Alexey Buzmakov, Zoltan Jurek, et al. "Start-to-end simulation of single-particle imaging using ultra-short pulses at the European X-ray Free-Electron Laser." IUCrJ 4, no. 5 (2017): 560–68. http://dx.doi.org/10.1107/s2052252517009496.

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Single-particle imaging with X-ray free-electron lasers (XFELs) has the potential to provide structural information at atomic resolution for non-crystalline biomolecules. This potential exists because ultra-short intense pulses can produce interpretable diffraction data notwithstanding radiation damage. This paper explores the impact of pulse duration on the interpretability of diffraction data using comprehensive and realistic simulations of an imaging experiment at the European X-ray Free-Electron Laser. It is found that the optimal pulse duration for molecules with a few thousand atoms at 5

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Takekuni, Tomohiro, Yasuhiro Okamoto, Takahiro Fujiwara, Akira Okada, and Isamu Miyamoto. "Effects of Focusing Condition on Micro-Welding Characteristics of Borosilicate Glass by Picosecond Pulsed Laser." Key Engineering Materials 656-657 (July 2015): 461–67. http://dx.doi.org/10.4028/www.scientific.net/kem.656-657.461.

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Glass materials are widely used in products such as optical components and semiconductor devices. In these products, precision welding techniques of glass are required to manufacture small and complicated shape. The laser welding method can perform the joining without an intermediate layer and an adhesive agent. In addition, an ultra-short pulse laser can reduce the heat affected zone with the high space accuracy. However, heating and cooling cycles are repeated even in the case of ultra-short pulsed laser. The temperature distribution and change of molten area are influenced not only by laser

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47

Wieger, Verena, Martin Straßl, and Ernst Wintner. "Laser dental hard tissue ablation: Comparison Er-lasers and scanned ultra-short pulse laser." International Journal of Applied Electromagnetics and Mechanics 25, no. 1-4 (2007): 635–40. http://dx.doi.org/10.3233/jae-2007-795.

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Pegarkov, A. I. "Nonlinear excitation and ionization of diatomic molecules by short laser pulses. Model of two active electrons in the field of a frozen core." Canadian Journal of Physics 80, no. 2 (2002): 149–71. http://dx.doi.org/10.1139/p01-138.

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The dynamics of electron excitation and ionization of diatomic molecules in short laser pulses is studied within a model of two active 1D electrons moving in the field of a frozen core. It is shown for example for the N2 molecule that the model reproduces the spectrum of the pulse-free Σ electronic states very well. The N2 electron dynamics is examined numerically for short τ = 30 fs and ultra-short τ = 5 fs laser pulses with λ = 800 nm and intensity 1013 W/cm2 ÷ 1015 W/cm2 as well as for the resonant pulse with τ = 1 fs and λ = 147 nm, 1014 W/cm2 ÷ 1016 W/cm2. The phenomena of strong above-th

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Sagisaka, Yoshihiro, Kiyomitsu Yamashita, Wataru Yanagihara, and Hiroyasu Ueta. "Microparts processing using laser cutting and ultra-short-pulse laser peen forming." Journal of Materials Processing Technology 219 (May 2015): 230–36. http://dx.doi.org/10.1016/j.jmatprotec.2014.12.028.

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Förster, Daniel J., Beat Jäggi, Andreas Michalowski, and Beat Neuenschwander. "Review on Experimental and Theoretical Investigations of Ultra-Short Pulsed Laser Ablation of Metals with Burst Pulses." Materials 14, no. 12 (2021): 3331. http://dx.doi.org/10.3390/ma14123331.

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Laser processing with ultra-short double pulses has gained attraction since the beginning of the 2000s. In the last decade, pulse bursts consisting of multiple pulses with a delay of several 10 ns and less found their way into the area of micromachining of metals, opening up completely new process regimes and allowing an increase in the structuring rates and surface quality of machined samples. Several physical effects such as shielding or re-deposition of material have led to a new understanding of the related machining strategies and processing regimes. Results of both experimental and numer

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