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Proceedings Paper

Laser induced periodic surface structures on pyrolytic carbon prosthetic heart valve
Author(s): Bogusz D. Stępak; Katarzyna M. Łęcka; Tomasz Płonek; Arkadiusz J. Antończak
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Paper Abstract

Laser-induced periodic surface structures (LIPSS) can appear in different forms such as ripples, grooves or cones. Those highly periodic wavy surface features which are frequently smaller than incident light wavelength bring possibility of nanostructuring of many different materials. Furthermore, by changing laser parameters one can obtain wide spectrum of periodicities and geometries. The aim of this research was to determine possibility of nanostructuring pyrolytic carbon (PyC) heart valve leaflets using different irradiation conditions. The study was performed using two laser sources with different pulse duration (15 ps, 450 fs) as well as different wavelengths (1064, 532, 355 nm). Both low and high spatial frequency LIPSS were observed for each set of irradiation parameters. In case femtosecond laser pulses we obtained deep subwavelength ripple period which was even ten times smaller than applied wavelength. Obtained ripple period was ranging from 90 up to 860 nm. Raman spectra revealed the increase of disorder after laser irradiation which was comparable for both pico- and femtosecond laser.

Paper Details

Date Published: 8 December 2016
PDF: 7 pages
Proc. SPIE 10159, Laser Technology 2016: Progress and Applications of Lasers, 101590J (8 December 2016); doi: 10.1117/12.2262151
Show Author Affiliations
Bogusz D. Stępak, Wrocław Univ. of Technology (Poland)
Katarzyna M. Łęcka, Wrocław Univ. of Technology (Poland)
Tomasz Płonek, Wrocław Medical Univ. (Poland)
Arkadiusz J. Antończak, Wrocław Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 10159:
Laser Technology 2016: Progress and Applications of Lasers
Ryszard S. Romaniuk; Krzysztof Kopczynski; Jan K. Jabczyński; Zygmunt Mierczyk, Editor(s)

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