Results 211 to 220 of about 1,293,751 (246)

Ablation of Solids under Femtosecond Laser Pulses

Physical Review Letters, 2002
We study the basic mechanisms leading to ablation by femtosecond laser pulses using molecular dynamics and a simple two-dimensional Lennard-Jones model. We demonstrate that the ablation process involves three different mechanisms as a function of deposited energy.
Danny, Perez, Laurent J, Lewis
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Lithographical laser ablation using femtosecond laser

Applied Physics A, 2004
Lithographical laser ablation was demonstrated using a femtosecond laser with a lithographical optical system. In this method, a femtosecond laser beam passes through a mask and the pattern is imaged on a film by a coherent optical system. As a result, the film is lithographically ablated, and a micron-sized pattern can be generated in a single shot ...
Y. Nakata, T. Okada, M. Maeda
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Fabrication of Paclitaxel Nanocrystals by Femtosecond Laser Ablation and Fragmentation

Journal of Pharmaceutical Sciences, 2011
Nanonization, which involves formulating the drug powder as nanometer-sized particles, is a known method to improve drug absorption and allow the intravenous administration of insoluble drugs. This study investigated a novel femtosecond (fs) laser technique for the fabrication of nanocrystals in aqueous solution of the insoluble model drug paclitaxel ...
Sukhdeep, Kenth, Jean-Philippe, Sylvestre, Kathrin, Fuhrmann, Michel, Meunier, Jean-Christophe, Leroux   +4 more
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Nanoparticle formation by femtosecond laser ablation

Journal of Physics D: Applied Physics, 2007
Ultra short femtosecond (fs) pulses for the laser ablation of materials lead to deposited films which are very different from those obtained by the well-known classical nanosecond (ns) pulsed laser deposition (PLD). In very specific cases, epitaxial thin films can be obtained, whereas in the majority of materials, the films formed by fs PLD are ...
Perrière, Jacques, Boulmer-Leborgne, Chantal, Benzerga, Ratiba, Tricot, Sylvain   +3 more
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Possibility of controllable ablation by femtosecond lasers

CLEO/Europe. 2005 Conference on Lasers and Electro-Optics Europe, 2005., 2006
We are studying the laser ablation of ceramics and semiconductors by the femtosecond laser (800 nm wavelength, 100 fs pulse duration) in air. The ceramics (Al2O3) and the silicon single crystal ( , P-types) were used as the target material. The crater profiles were analyzed using the confocal laser scanning microscope.
M. Fujita, A. Kinoshita, Y. Wada, Yu. Izawa, M. Hashida, H. Nakano, Y. Izawa, C. Yamanaka   +7 more
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Femtosecond laser ablation ICP-MS

J. Anal. At. Spectrom., 2002
Femtosecond laser ablation was investigated for direct solid sample chemical analysis. The phonon relaxation time in a solid is of the order of 100 fs, which is the same as the laser pulse duration. For such excitation, there should be little time for the matrix to experience a “temperature” during the laser pulse.
Richard E. Russo, Xianglei Mao, Jhanis J. Gonzalez, Samuel S. Mao   +3 more
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Bending diamonds by femtosecond laser ablation

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2009
We present a new method based on femtosecond laser ablation for the fabrication of statically bent diamond crystals. Using this method, curvature radii of 1 m can easily be achieved, and the curvature obtained is very uniform. Since diamond is extremely tolerant to high radiation doses, partly due to its densely packed lattice, such bent crystals are ...
Balling, Peter; id_orcid 0000-0003-4955-770X, Esberg, Jakob, Kirsebom, Kim, Le, Dang Quang Svend, Uggerhøj, Ulrik Ingerslev; id_orcid 0000-0002-8229-1512, Connell, S.H., Härtwig, J., Masiello, F., Rommeveaux, A.   +8 more
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Femtosecond pulsed laser ablation of GaAs

Applied Surface Science, 2004
Abstract The properties of femtosecond-pulsed laser deposited GaAs nanoclusters were investigated. Nanoclusters of GaAs were produced by laser ablating a single crystal GaAs target in vacuum or in a buffer gas using a Ti–sapphire laser with a 150 fs minimum pulse length. For in-vacuum deposition, X-ray diffraction (XRD), scanning electron microscopy (
T.W Trelenberg, L.N Dinh, C.K Saw, B.C Stuart, M Balooch   +4 more
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Ultrafast femtosecond laser ablation of graphite

Laser Physics Letters, 2015
Fluence dependences of IR and UV reflectivity of femtosecond laser pulses on a HOPG surface demonstrate their saturation in a certain fluence range, starting from 0.2 J cm−2, where single-shot non-linear plasma emission is detected by electric probe measurements.
Andrey A Ionin, Sergey I Kudryashov, Sergey V Makarov, N N Mel’nik, Pavel N Saltuganov, Leonid V Seleznev, Dmitry V Sinitsyn   +6 more
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Femtosecond laser ablation of nickel in vacuum

Journal of Physics D: Applied Physics, 2007
We present an experimental characterization and a theoretical analysis of ultrashort laser ablation of a nickel target, which highlights the more general and peculiar features of femtosecond (fs) laser ablation of metals. The study has been carried out by using visible (527 nm) laser pulses of approximate to 300 fs duration.
Amoruso S, Bruzzese R, Wang X, Nedialkov NN, Atanasov PA   +4 more
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