Large area uniform femtosecond-laser-induced periodic surface structures fabricated on heated LiNbO3:Fe

2021 ◽  
Author(s):  
Yanan Li ◽  
Tianhao Zhang
Keyword(s):  
Femtosecond Laser ◽  
Laser Scanning ◽  
Scanning Speed ◽  
Surface Structures ◽  
Optimum Process ◽  
Large Area ◽  
Periodic Surface ◽  
Laser Fluences ◽  
Fs Laser ◽  
Scanning Irradiation

Abstract The influence of laser fluences and scanning speeds on the morphologies of laser-induced periodic surface structures(LIPSS) on heated LiNbO3:Fe(1000○C) surfaces was investigated under femtosecond(fs) laser scanning irradiation. Laser fluence of 8.5 kJ/m2 and scanning speed of 1 mm/s were found to be optimum process parameters, and large-area fs-LIPSS on LiNbO3:Fe with an area of 8 mm×8 mm were fabricated with these parameters. The wettability of laser-textured LiNbO3:Fe changed to be hydrophilic, and the absorptance was improved substantially in the spectral range of 400-2000 nm. This technique is efficient, and environmentally friendly, which will attract tremendous interest in nano-photoelectron and nano-mechanics.

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

Controllable formation of laser-induced periodic surface structures on ZnO film by temporally shaped femtosecond laser scanning

2020 ◽  
Vol 45 (8) ◽  
pp. 2411
Author(s):  
Shaojun Wang ◽  
Lan Jiang ◽  
Weina Han ◽  
Wei Liu ◽  
Jie Hu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Scanning ◽  
Surface Structures ◽  
Zno Film ◽  
Periodic Surface

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.

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

Gold-film coating assisted femtosecond laser fabrication of large-area, uniform periodic surface structures

2015 ◽  
Vol 54 (6) ◽  
pp. 1314 ◽  
Author(s):  
Pin Feng ◽  
Lan Jiang ◽  
Xin Li ◽  
Wenlong Rong ◽  
Kaihu Zhang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Gold Film ◽  
Film Coating ◽  
Surface Structures ◽  
Large Area ◽  
Laser Fabrication ◽  
Periodic Surface

scholarly journals Quality Improvement of Laser-Induced Periodic Ripple Structures on Silicon Using a Bismuth-Indium Alloy Film

2021 ◽  
Vol 11 (2) ◽  
pp. 632
Author(s):  
Yao Chen ◽  
Yao Shan ◽  
Huatian Tu ◽  
Haotian Zhang ◽  
Rong He ◽  
...  
Keyword(s):  
Periodic Structures ◽  
Early Stage ◽  
Alloy Film ◽  
Pulse Number ◽  
Surface Structures ◽  
Large Area ◽  
Free Electrons ◽  
Periodic Surface ◽  
Laser Fluences

In this work, a new buffer layer material, a bismuth-indium (Bi-In) alloy, was utilized to improve the quality of large-area, laser-induced periodic ripple structures on silicon. Better-defined ripple structures and larger modification areas were obtained at different scanning speeds by pre-depositing a Bi-In film. The single-spot investigations indicated that ripple structures were much easier to form on silicon coated with the Bi-In film under laser fluences of 2.04 and 2.55 J/cm2 at a fixed pulse number of 200 in comparison with on bare silicon. A physical model in terms of the excellent thermal conductivity contributed by the free electrons in the Bi-In film homogenizing the thermal distribution caused by the laser irradiation in the early stage of the formation of laser-induced periodic surface structures was proposed to explain the above phenomena. The results show that the Bi-In film enabled a wider range of laser fluences to generate periodic structures and helped to form regular ripple structures on the silicon. In addition, the modulation effects of the laser fluence and pulse number on surface structures were studied experimentally and are discussed in detail.

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