Open AccessTexturing metal surface with MHz ultra-short laser pulses
Author(s) -
Fotis Fraggelakis,
John Lopez,
Inka Manek-Hönninger,
Rainer Kling
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.018131
Subject(s) - fluence , optics , laser , materials science , repetition (rhetorical device) , pulse (music) , surface (topology) , physics , philosophy , linguistics , geometry , mathematics , detector
We show, for the first time to our knowledge, the role the heat accumulation plays on the evolution of ultra-short pulse laser-induced surface structures morphology when varying fluence, the number of scans and the repetition rate from 100 kHz up to 2 MHz. We demonstrate how to tailor the size of micro-spikes from nearly ten microns to several tens of microns by a systematic variation of both fluence and overlap. We believe our results will contribute to an in deep understanding of the mechanisms underlying laser surface structuration at high repetition rates.