Results 201 to 210 of about 1,293,751 (246)

Femtosecond laser ablation of copper

SPIE Proceedings, 2003
In recent years, femtosecond (fs) laser ablation has attracted much interest in both basic and applied physics, mainly because of its potential application in micromachining and pulsed laser deposition. Ultrashort laser ablation have the capability to ablate materials precisely with little or no collateral damage, even with materials that are ...
Yeow-Whatt Goh, Yong-Feng Lu, Ming-Hui Hong, Tow Chong Chong   +3 more
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Femtosecond laser ablation of aluminium

Applied Surface Science, 2009
Abstract We investigate femtosecond laser ablation of aluminium using a hybrid simulation scheme. Two equations are solved simultaneously: one for the electronic system, which accounts for laser energy absorption and heat conduction, the other for the dynamics of the lattice where the ablation process takes place.
S. Sonntag, J. Roth, F. Gaehler, H.-R. Trebin   +3 more
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Femtosecond Laser Ablation of Polyethylene

Japanese Journal of Applied Physics, 2003
A 790 nm, 130 fs Ti:sapphire laser was used for the ablation of polyethylene. Compared to a 193 nm, 23 ns ArF laser, the ablated surface was precisely limited by the area exposed and a trace of the molten material could not be seen in the area. Moreover, the fs laser did not change the chemical composition of the ablated surface because of its low ...
Masayuki Okoshi, Narumi Inoue
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Femtosecond laser ablation and nanostructuring

SPIE Proceedings, 2002
At the Laser Zentrum Hannover investigations of possibilities to use femtosecond laser pulses for direct ablative writing and microstructuring of solid materials have been started in 1995. Since then considerable progress in understanding and in the application of different femtosecond technologies has been obtained.
Boris N. Chichkov, Frank Korte, J. Koch, Stefan Nolte, Andreas Ostendorf   +4 more
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Femtosecond laser ablation and nauostructuring

ICALEO 2001: Proceedings of the Laser Materials Processing Conference and Laser Microfabrication Conference, 2001
At the Laser Zentrum Hannover investigations of possibilities to use femtosecond laser pulses for direct ablative writing and microstructuring of solid materials have been started in 1995. Since then considerable progress in understanding and in the application of different femtosecond technologies has been obtained.
B. N. Chichkov, A. Ostendorf, F. Korte, S. Nolte   +3 more
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Femtosecond laser ablation of DAST

Applied Surface Science, 2003
Abstract High rate femtosecond (fs) laser ablation of the organic salt 4-N,N-dimethylamino-4-N-methyl-stilbazolium tosylate (DAST), an organic crystal with very high optical nonlinearities has been demonstrated. The threshold fluence and the ideal fluence range for damage free ablation for the wavelengths 550, 600, and 775 nm have been determined and
Ph. Dittrich, R. Bartlome, G. Montemezzani, P. Günter   +3 more
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Femtosecond laser ablation elemental mass spectrometry

Mass Spectrometry Reviews, 2006
AbstractLaser ablation mass spectrometry (LA‐MS) has always been an interesting method for the elemental analysis of solid samples. Chemical analysis with a laser requires small amounts of material. Depending on the analytical detection system, subpicogram quantities may be sufficient.
Roland, Hergenröder, Ota, Samek, Vanja, Hommes   +2 more
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Femtosecond laser ablation for microfluidics

Optical Engineering, 2005
We present some applications of femtosecond laser ablation for microfluidics. A doubled Ti:sapphire femtosecond laser (=400 nm; pulse width, 90 fs; pulse energy up to 350 µJ; pulse repetition rate, 1 kHz) is used to microstructure passive microfluidic devices (channels, reservoirs, through-holes) in polymers [polymethyl methacrylate (PMMA), polyimide ...
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Fabrication of Atom Chips with Femtosecond Laser Ablation

Quantum-Atom Optics Downunder, 2007
We report on the development of a new microfabrication technique for atom chips which is based on femtosecond laser ablation of thin films and allows the production of arbitrary patterns of microwires. We describe the ablation procedure and present the results of microwire quality analysis, which involves SEM imaging and magnetic field microscopy.
Wolff, H., Whitlock, S., Lowe, M., Wang, James, Hall, Brenton, Sidorov, Andrei, Hannaford, Peter   +6 more
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Neutrals ejection in intense femtosecond laser ablation

Optics Letters, 2011
Time-resolved shadowgraphs and holograms of intense femtosecond laser ablation of aluminum are reported. The different bending trends of interference fringes are found in the ablations of aluminum and other materials at probe wavelengths of 400 and 800 nm, for the first time to our knowledge, which could be attributed to the ejection of massive neutral
Haofeng, Hu, Xiaolei, Wang, Hongchen, Zhai   +2 more
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