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

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6714
Author(s):  
Dmitrij A. Belousov ◽  
Kirill A. Bronnikov ◽  
Konstantin A. Okotrub ◽  
Sergey L. Mikerin ◽  
Victor P. Korolkov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Orientation Angle ◽  
Ambient Air ◽  
Chemical Oxidation ◽  
Surface Structures ◽  
Large Area ◽  
Temperature Oxidation ◽  
Periodic Surface ◽  
High Regularity ◽  
Wide Range

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.

scholarly journals Large-Area Fabrication of Laser-Induced Periodic Surface Structures on Fused Silica Using Thin Gold Layers

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1187 ◽  
Author(s):  
Clemens Kunz ◽  
Sebastian Engel ◽  
Frank Müller ◽  
Stephan Gräf
Keyword(s):  
Fused Silica ◽  
Surface Structures ◽  
Spatial Period ◽  
Direct Writing ◽  
Large Area ◽  
Periodic Surface ◽  
Single Spot ◽  
Research Activities ◽  
Wide Range ◽  
Fs Laser

Despite intensive research activities in the field of laser-induced periodic surface structures (LIPSS), the large-area nanostructuring of glasses is still a challenging problem, which is mainly caused by the strongly non-linear absorption of the laser radiation by the dielectric material. Therefore, most investigations are limited to single-spot experiments on different types of glasses. Here, we report the homogeneous generation of LIPSS on large-area surfaces of fused silica using thin gold layers and a fs-laser with a wavelength λ = 1025 nm, a pulse duration τ = 300 fs, and a repetition frequency frep = 100 kHz as radiation source. For this purpose, single-spot experiments are performed to study the LIPSS formation process as a function of laser parameters and gold layer thickness. Based on these results, the generation of large-area homogenous LIPSS pattern was investigated by unidirectional scanning of the fs-laser beam across the sample surface using different line spacing. The nanostructures are characterized by a spatial period of about 360 nm and a modulation depth of around 160 nm. Chemical surface analysis by Raman spectroscopy confirms a complete ablation of the gold film by the fs-laser irradiation. The characterization of the functional properties shows an increased transmission of the nanostructured samples accompanied by a noticeable change in the wetting properties, which can be additionally modified within a wide range by silanization. The presented approach enables the reproducible LIPSS-based laser direct-writing of sub-wavelength nanostructures on glasses and thus provides a versatile and flexible tool for novel applications in the fields of optics, microfluidics, and biomaterials.

scholarly journals Лазерно-индуцированные пространственно-периодические структуры на поверхности титана в среде н-гексана при различном давлении

2020 ◽  
Vol 46 (15) ◽  
pp. 51
Author(s):  
Д.А. Кочуев ◽  
К.С. Хорьков ◽  
А.С. Черников ◽  
Р.В. Чкалов ◽  
В.Г. Прокошев
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Laser Radiation ◽  
Pressure Range ◽  
Titanium Surface ◽  
Surface Structures ◽  
Femtosecond Laser Radiation ◽  
Periodic Surface ◽  
Laser Induced Plasma ◽  
Scanning Electron

The paper presents the results of processing titanium surface in n-hexane at various pressures by femtosecond laser radiation. The effect of laser-induced plasma on the nature of the formation of periodic surface structures in the pressure range from 6 mbar to 22 bar is considered. The study of the surface of the processed samples was carried out using scanning electron microscopy. The dependence of the period of obtained laser-induced periodic surface structures on the pressure in working vessel and the treatment regime is shown.

scholarly journals Large-area fabrication of low- and high-spatial-frequency laser-induced periodic surface structures on carbon fibers

Carbon ◽  
2018 ◽  
Vol 133 ◽  
pp. 176-185 ◽  
Author(s):  
Clemens Kunz ◽  
Tobias N. Büttner ◽  
Björn Naumann ◽  
Anne V. Boehm ◽  
Enrico Gnecco ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
Carbon Fibers ◽  
High Spatial Frequency ◽  
Surface Structures ◽  
Large Area ◽  
Periodic Surface ◽  
Frequency Laser

Extremely regular periodic surface structures in a large area efficiently induced on silicon by temporally shaped femtosecond laser

2021 ◽  
Author(s):  
Yuchan Zhang ◽  
Q.L J ◽  
Kaiqiang Cao ◽  
Tianqi Chen ◽  
Chengke No Last Name ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Surface Structures ◽  
Large Area ◽  
Periodic Surface

Large area laser-induced periodic surface structures on steel by bursts of femtosecond pulses with picosecond delays

2019 ◽  
Vol 114 ◽  
pp. 15-21 ◽  
Author(s):  
Giuseppe Giannuzzi ◽  
Caterina Gaudiuso ◽  
Cinzia Di Franco ◽  
Gaetano Scamarcio ◽  
Pietro Mario Lugarà ◽  
...  
Keyword(s):  
Surface Structures ◽  
Femtosecond Pulses ◽  
Large Area ◽  
Periodic Surface

scholarly journals Laser radiation impact on a solid surface and formation of micro- and nanostructures

2019 ◽  
Vol 220 ◽  
pp. 01010 ◽  
Author(s):  
Dmitriy Kochuev ◽  
Ruslan Chkalov ◽  
Valery Prokoshev ◽  
Kirill Khorkov
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Solid Surface ◽  
Laser Processing ◽  
Surface Structures ◽  
Periodic Surface ◽  
Femtosecond Laser Processing

The work is devoted to the problem of microand nanostructuring of the surface of solids as a result of exposure to laser radiation. The method of forming periodic surface structures by means of femtosecond laser processing is presented using the example of solving the problem of titanium structuring.

High speed inscription of uniform, large-area laser-induced periodic surface structures in Cr films using a high repetition rate fs laser

2014 ◽  
Vol 39 (8) ◽  
pp. 2491 ◽  
Author(s):  
A. Ruiz de la Cruz ◽  
R. Lahoz ◽  
J. Siegel ◽  
G. F. de la Fuente ◽  
J. Solis
Keyword(s):  
Repetition Rate ◽  
High Speed ◽  
High Repetition Rate ◽  
Surface Structures ◽  
Large Area ◽  
Periodic Surface ◽  
High Repetition ◽  
Fs Laser
Sign in / Sign up

Export Citation Format

Share Document