Pimenov, Sergei M.; Zavedeev, Evgeny V.; Jaeggi, Beat; Zürcher, Josef; Neuenschwander, Beat (2022). Sub-Threshold Fabrication of Laser-Induced Periodic Surface Structures on Diamond-like Nanocomposite Films with IR Femtosecond Pulses Materials, 15(13), pp. 1-13. Molecular Diversity Preservation International (MDPI) 10.3390/ma15134506
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In the paper, we study the formation of laser-induced periodic surface structures (LIPSS) on diamond-like nanocomposite (DLN) a-C:H:Si:O films during nanoscale ablation processing at low fluences—below the single-pulse graphitization and spallation thresholds—using an IR fs-laser (wavelength 1030 nm, pulse duration 320 fs, pulse repetition rate 100 kHz, scanning beam velocity 0.04–0.08 m/s). The studies are focused on microscopic analysis of the nanostructured DLN film surface at different stages of LIPSS formation and numerical modeling of surface plasmon polaritons in a thin graphitized surface layer. Important findings are concerned with (i) sub-threshold fabrication of high spatial frequency LIPSS (HSFL) and low spatial frequency LIPSS (LSFL) under negligible surface graphitization of hard DLN films, (ii) transition from the HSFL (periods of 140 ± 30 and 230 ± 40 nm) to LSFL (period of 830–900 nm) within a narrow fluence range of 0.21–0.32 J/cm2, (iii) visualization of equi-field lines by ablated nanoparticles at an initial stage of the LIPSS formation, providing proof of larger electric fields in the valleys and weaker fields at the ridges of a growing surface grating, (iv) influence of the thickness of a laser-excited glassy carbon (GC) layer on the period of surface plasmon polaritons excited in a three-layer system “air/GC layer/DLN film”.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
School of Engineering and Computer Science > Institute for Surface Applied Laser, Phototonics and Surface Technologies ALPS > ALPS / Laser Surface Engineering School of Engineering and Computer Science |
Name: |
Pimenov, Sergei M.; Zavedeev, Evgeny V.; Jaeggi, Beat; Zürcher, Josef and Neuenschwander, Beat  0000-0001-9715-8557 |
Subjects: |
Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
ISSN: |
1996-1944 |
Publisher: |
Molecular Diversity Preservation International (MDPI) |
Language: |
English |
Submitter: |
Beat Neuenschwander |
Date Deposited: |
20 Jul 2022 08:20 |
Last Modified: |
20 Jul 2022 08:20 |
Publisher DOI: |
10.3390/ma15134506 |
Uncontrolled Keywords: |
diamond-like nanocomposite (DLN) films; femtosecond laser; ablation; spallation; laser-induced periodic surface structures (LIPSS); surface plasmon polaritons |
ARBOR DOI: |
10.24451/arbor.17202 |
URI: |
https://arbor.bfh.ch/id/eprint/17202 |
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