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Proceedings Paper

Nonlinear reflection from polymer surfaces during femtosecond ultraviolet photoablation
Author(s): D. Xenakis; Costas Kalpouzos; Costas Fotakis; Zsolt Bor; Bela Racz; Gabor Szabo
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Paper Abstract

The sub-picosecond response of the surface reflectivity of different polymers during ablation was measured using a pump-and-probe technique. Ablation was generated by a 0.5 ps duration KrF excimer laser. The time-dependent reflectivity of the surfaces was measured by a 496 nm, 0.5 ps long, low power laser. It showed an up to 4-fold increase from the unirradiated sample to a maximum of 94% within less than a picosecond and with a few picoseconds falltime. The spectrum of the ultraviolet light reflected from the spot is blue-shifted and exhibits more than three times the bandwidth of the incident radiation.

Paper Details

Date Published: 31 March 1995
PDF: 5 pages
Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); doi: 10.1117/12.204885
Show Author Affiliations
D. Xenakis, Institute of Electronic Structure and Laser (Greece)
Costas Kalpouzos, Institute of Electronic Structure and Laser (Greece)
Costas Fotakis, Institute of Electronic Structure and Laser (Greece)
Zsolt Bor, Jate Univ. (Hungary)
Bela Racz, Jate Univ. (Hungary)
Gabor Szabo, Jate Univ. (Hungary)


Published in SPIE Proceedings Vol. 2502:
Gas Flow and Chemical Lasers: Tenth International Symposium
Willy L. Bohn; Helmut Huegel, Editor(s)

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