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Volume 14
Issue 21
10.3390/ma14216714
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Article

Thermochemical Laser-Induced Periodic Surface Structures Formation by Femtosecond Laser on Hf Thin Films in Air and Vacuum

by
Dmitrij A. Belousov
*,
Kirill A. Bronnikov
,
Konstantin A. Okotrub
,
Sergey L. Mikerin
,
Victor P. Korolkov
,
Vadim S. Terentyev
and
Alexander V. Dostovalov
*
Institute of Automation and Electrometry of the SB RAS, Novosibirsk State University, Academician Koptyug Ave. 1, Novosibirsk 630090, Russia
*
Authors to whom correspondence should be addressed.
Materials 2021, 14(21), 6714; https://doi.org/10.3390/ma14216714
Submission received: 27 September 2021 / Revised: 24 October 2021 / Accepted: 4 November 2021 / Published: 8 November 2021
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Abstract

Thermochemical laser-induced periodic surface structures (TLIPSS) are a relatively new type of periodic structures formed in the focal area of linear polarized laser radiation by the thermally stimulated reaction of oxidation. The high regularity of the structures and the possibility of forming high-ordered structures over a large area open up possibilities for the practical application for changing the optical and physical properties of materials surface. Since the mechanism of formation of these structures is based on a chemical oxidation reaction, an intriguing question involves the influence of air pressure on the quality of structure formation. This paper presents the results on the TLIPSS formation on a thin hafnium film with fs IR laser radiation at various ambient air pressures from 4 Torr to 760 Torr. Despite the decrease in the oxygen content in the ambient environment by two orders of magnitude, the formation of high-ordered TLIPSS (dispersion in the LIPSS orientation angle δθ < 5°) with a period of ≈700 nm occurs within a wide range of parameters variation (laser power, scanning speed). This behavior of TLIPSS formation is in agreement with experimental data obtained earlier on the study of the kinetics of high-temperature oxidation of hafnium at various oxygen pressures.
Keywords: laser-induced periodic surface structures; hafnium films; digital image processing; microscopy; laser materials processing laser-induced periodic surface structures; hafnium films; digital image processing; microscopy; laser materials processing

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MDPI and ACS Style

Belousov, D.A.; Bronnikov, K.A.; Okotrub, K.A.; Mikerin, S.L.; Korolkov, V.P.; Terentyev, V.S.; Dostovalov, A.V. Thermochemical Laser-Induced Periodic Surface Structures Formation by Femtosecond Laser on Hf Thin Films in Air and Vacuum. Materials 2021, 14, 6714. https://doi.org/10.3390/ma14216714

AMA Style

Belousov DA, Bronnikov KA, Okotrub KA, Mikerin SL, Korolkov VP, Terentyev VS, Dostovalov AV. Thermochemical Laser-Induced Periodic Surface Structures Formation by Femtosecond Laser on Hf Thin Films in Air and Vacuum. Materials. 2021; 14(21):6714. https://doi.org/10.3390/ma14216714

Chicago/Turabian Style

Belousov, Dmitrij A., Kirill A. Bronnikov, Konstantin A. Okotrub, Sergey L. Mikerin, Victor P. Korolkov, Vadim S. Terentyev, and Alexander V. Dostovalov. 2021. "Thermochemical Laser-Induced Periodic Surface Structures Formation by Femtosecond Laser on Hf Thin Films in Air and Vacuum" Materials 14, no. 21: 6714. https://doi.org/10.3390/ma14216714

APA Style

Belousov, D. A., Bronnikov, K. A., Okotrub, K. A., Mikerin, S. L., Korolkov, V. P., Terentyev, V. S., & Dostovalov, A. V. (2021). Thermochemical Laser-Induced Periodic Surface Structures Formation by Femtosecond Laser on Hf Thin Films in Air and Vacuum. Materials, 14(21), 6714. https://doi.org/10.3390/ma14216714

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