Femtosecond study of surface structure and composition and time-resolved spectroscopy in metals |
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| Authors: | Dou K Knobbe ET Parkhill RL Irwin B Matthews L Church KH |
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| Institution: | (1) Department of Physics and University Center for Laser and Photonics Research, Oklahoma State University, Stillwater, OK 74 078, USA, US;(2) Sciperio, Inc., 5202-2 N. Richmond Hill Rd., Stillwater, OK 74 075, USA, US |
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| Abstract: | Surface structuring and compositioning in aluminum alloy 2024-T3 were demonstrated using a femtosecond pulse laser. Surface
nanostructuring was developed as a function of laser parameters and the surface micrographs of the scanning electron microscopy
were characterized as a function of incident laser fluence. Surface compositioning was performed by selectively removing the
elements on the surface of the sample. Femtosecond studies of highly excited electrons were performed by a pump–probe technique,
and the thermalization time was found to be in a range of 1.5–3 ps, increasing with incident fluence. The time-resolved measurement
is well matched to the numerical calculation.
Received: 6 September 2001 / Accepted: 18 July 2002 / Published online: 25 October 2002
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ID="*"Corresponding author. Fax: +1-405/744-6811, E-mail: dou@okstate.edu |
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| Keywords: | PACS: 78 47 +p 81 16 Rf 78 66 Bz 79 20 Ds 42 55 Lt |
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