Paper
19 August 1998 Femtosecond UV-laser ablation of solid targets
Peter Simon
Author Affiliations +
Proceedings Volume 3573, OPTIKA '98: 5th Congress on Modern Optics; (1998) https://doi.org/10.1117/12.320988
Event: OPTIKA '98: Fifth Congress on Modern Optics, 1998, Budapest, Hungary
Abstract
Ablation of submicron structures on metals and semiconductors by short ultraviolet laser pulses (0.5 - 50 ps, 248 nm) is presented. Features like periodic line structures with a line-spacing below 400 nm, and holes with diameters well below 1 micrometers are produced on the sample surface by single laser shot exposure. The structures are projection printed by a Schwarzschild-objective (NA equals 0.4) in air environment. The dynamics of the surface modification has been studied using a pump-probe technique. The ablated grating structure is illuminated with a second, weak probe pulse (500 fs at 496 nm) whose diffracted light (0th, 1st, 2nd order signals) is recorded as a function of the delay between the two pulses. The results provide valuable time- resolved information about the change of the surface morphology.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter Simon "Femtosecond UV-laser ablation of solid targets", Proc. SPIE 3573, OPTIKA '98: 5th Congress on Modern Optics, (19 August 1998); https://doi.org/10.1117/12.320988
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KEYWORDS
Diffraction gratings

Picosecond phenomena

Diffraction

Metals

Reflectivity

Laser ablation

Femtosecond phenomena

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