Nonlinear reflection from polymer surfaces during femtosecond ultraviolet photoablation

D. Xenakis; Costas Kalpouzos; Costas Fotakis; Zsolt Bor; Bela Racz; Gabor Szabo

doi:10.1117/12.204885

31 March 1995 Nonlinear reflection from polymer surfaces during femtosecond ultraviolet photoablation

D. Xenakis, Costas Kalpouzos, Costas Fotakis, Zsolt Bor, Bela Racz, Gabor Szabo

Proceedings Volume 2502, Gas Flow and Chemical Lasers: Tenth International Symposium; (1995) https://doi.org/10.1117/12.204885
Event: Gas Flow and Chemical Lasers: Tenth International Symposium, 1994, Friedrichshafen, Germany

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.

Citation Download Citation

D. Xenakis, Costas Kalpouzos, Costas Fotakis, Zsolt Bor, Bela Racz, and Gabor Szabo "Nonlinear reflection from polymer surfaces during femtosecond ultraviolet photoablation", Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); https://doi.org/10.1117/12.204885

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