Dr. Simas Butkus Profile

Dr. Simas Butkus

at Vilnius Univ

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 13 March 2024 Presentation

Precision micromachining using a novel femtosecond flat-top UV laser

Kamilė Kasaciunaitė, Mykolas Karpavicius, Lukas Rimkus, Martynas Barkauskas, Simas Butkus

Proceedings Volume PC12873, PC128730H (2024) https://doi.org/10.1117/12.3002202

KEYWORDS: Ultrafast phenomena, Femtosecond phenomena, Ultraviolet radiation, Surface roughness, Laser engraving, Laser ablation, Telecommunications, Transmittance, Micromachining, Harmonic generation

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Proceedings Article | 25 May 2022 Paper

Surface roughness optimization during femtosecond UV laser ablation

Dominyka Stonyte, Vytautas Jukna, Simas Butkus, Domas Paipulas

Proceedings Volume 12142, 1214216 (2022) https://doi.org/10.1117/12.2621036

KEYWORDS: Femtosecond phenomena, Glasses, Ultraviolet radiation, Surface roughness, Laser ablation, Sapphire, Femtosecond laser micromachining, Microfabrication, Pulsed laser operation, 3D microstructuring, Absorption

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Proceedings Article | 25 May 2022 Paper

Integration of Mach-Zehnder interferometer on optical fiber using UV femtosecond laser pulses

Kamilė Kasačiūnaitė, Simas Butkus, Domas Paipulas

Proceedings Volume 12142, 121421B (2022) https://doi.org/10.1117/12.2621949

KEYWORDS: Optical fibers, Femtosecond phenomena, Mach-Zehnder interferometers, Interferometers, Ultraviolet radiation, Surface roughness, Laser ablation

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Proceedings Article | 25 May 2022 Poster + Paper

Numerical simulations and experimental analysis of scanning techniques for low-roughness surfaces using UV femtosecond pulses

Evaldas Kažukauskas, Simas Butkus, Vytautas Jukna, Domas Paipulas, Valdas Sirutkaitis

Proceedings Volume 12142, 1214219 (2022) https://doi.org/10.1117/12.2621763

KEYWORDS: Femtosecond phenomena, Data modeling, Ultraviolet radiation, Surface roughness, Numerical simulations, Laser ablation, Micromachining

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Proceedings Article | 24 May 2022 Presentation

Formation and investigation of highly-regular laser induced periodic surface structures on metals using IR and UV femtosecond lasers

Tauras Bukelis, Ona Balachninaite, Simas Butkus, Domas Paipulas

Proceedings Volume PC12131, PC121310T (2022) https://doi.org/10.1117/12.2621346

KEYWORDS: Polishing, Titanium, Femtosecond phenomena, Polarization, Visualization, Metals, Ultraviolet radiation, Scanning electron microscopy, Pulsed laser operation, Surface finishing

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Material surfaces irradiated with laser radiation under specific conditions can lead to laser-induced periodic surface structure (LIPSS) formation. The formation of these surface structures is a robust one-step method that allows for high throughput and cheap surface nano-structuring with spatial periods that can be greatly lower than the irradiating laser wavelength. Typically, a structural size ranges from several micrometers down to less than 100 nm and the structures strongly correlate with the polarization direction of the light used for their formation. The regularity of LIPSS formation depends on various laser and material parameters. Some metals can exhibit highly regular LIPSS (HR-LIPSS) when the correct conditions are met. One of the main drawbacks of precise LIPSS texturization is the difficulty in controlling the ripple quality. Thus, understanding the processes which lead to HR-LIPSS formation is one step in making laser-based material texturization more prevalent. The aim of this research was to create highly regular surface structures and investigate how the ripple formation depends on various laser and material properties. The experiment was carried out using femtosecond laser systems. Different laser harmonics modules were used for the LIPSS formation to cover both the IR and UV wavelengths. Structures were formed on various steel, copper, aluminum, and titanium samples employing different laser wavelengths, pulse energies, pulse overlaps, and polarizations. The resulting surface structures were then examined both visually and with the help of a scanning electron microscope (SEM). LIPSS images taken by SEM were then digitally processed to calculate the distribution of LIPSS orientation angle (DLOA) which characterizes the regularity of the surface structures. We show that by using ultraviolet femtosecond laser sources, choosing the right pulse energy, pulse overlap values, and sufficiently sharp focusing lens, HR-LIPSS can be formed on metals for which highly regular ripples don’t form using infrared laser radiation.

Proceedings Article | 8 March 2021 Presentation

Comparison of ultrashort pulse laser ablation with GHz pulse bursts and MHz pulse bursts of metals, silicon, and dielectric materials

Stefan Remund, Markus Gafner, Michalina Chaja, Aivaras Urniežius, Simas Butkus, Beat Neuenschwander

Proceedings Volume 11673, 116730C (2021) https://doi.org/10.1117/12.2583192

KEYWORDS: Ultrafast phenomena, Metals, Dielectrics, Silicon, Semiconductor lasers, Laser ablation, Picosecond phenomena, Zirconium, Zirconium dioxide, Laser systems engineering

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Proceedings Article | 2 March 2020 Presentation + Paper

Machining metals and silicon with GHz bursts: Surprising tremendous reduction of the specific removal rate for surface texturing applications

Thomas Hirsiger, Markus Gafner, Stefan Remund, Michalina Chaja, Aivaras Urniezius, Simas Butkus, Beat Neuenschwander

Proceedings Volume 11267, 112670T (2020) https://doi.org/10.1117/12.2543948

KEYWORDS: Metals, Particles, Copper, Silicon, Materials processing, Surface roughness, Scanning electron microscopy, Picosecond phenomena, Photomicroscopy, Surface finishing

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Proceedings Article | 4 March 2019 Paper

Rapid delamination of GaN coatings with femtosecond laser lift-off technique

Domas Paipulas, Simas Butkus, Valdas Sirutkaitis

Proceedings Volume 10906, 109060H (2019) https://doi.org/10.1117/12.2507196

KEYWORDS: Femtosecond phenomena, Laser processing, Surface roughness, Gallium nitride, Sapphire, Gallium, Laser liftoff

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SPIE Journal Paper | 15 September 2017

Hybrid subtractive-additive-welding microfabrication for lab-on-chip applications via single amplified femtosecond laser source

Linas Jonušauskas, Sima Rekštyte, Ričardas Buividas, Simas Butkus, Roaldas Gadonas, Saulius Juodkazis, Mangirdas Malinauskas

OE, Vol. 56, Issue 09, 094108, (September 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.9.094108

KEYWORDS: Glasses, Lab on a chip, Femtosecond phenomena, Microfabrication, Additive manufacturing, Microfluidics, Optical filters, Laser ablation, Particles, Image filtering

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Proceedings Article | 20 February 2017 Presentation + Paper

Laser subtractive-additive-welding microfabrication for Lab-On-Chip (LOC) applications

Linas Jonušauskas, Sima Rekštytė, Ričardas Buivydas, Simas Butkus, Domas Paipulas, Roaldas Gadonas, Saulius Juodkazis, Mangirdas Malinauskas

Proceedings Volume 10115, 101150V (2017) https://doi.org/10.1117/12.2249828

KEYWORDS: Lithography, Optical filters, Microfluidics, Femtosecond phenomena, Polarization, Polymers, Glasses, Particles, Manufacturing, 3D printing, Additive manufacturing, Ionization, Lab on a chip, Micro optics, Ultrafast lasers, Tissue engineering, Microfabrication, Nanophotonics, Rapid manufacturing, Multiphoton processes

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Proceedings Article | 1 May 2014 Paper

Microfabrication of transparent materials using filamented femtosecond laser beams

S. Butkus, D. Paipulas, Eugenijus Gaižauskas, D. Kaškelytė, V. Sirutkaitis

Proceedings Volume 9135, 91351E (2014) https://doi.org/10.1117/12.2051160

KEYWORDS: Femtosecond phenomena, Glasses, Scanners, Laser drilling, Laser ablation, Sapphire, Laser cutting, Microfabrication, Pulsed laser operation, Soda-lime glass

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Proceedings Article | 7 March 2014 Paper

Rapid microfabrication of transparent materials using a filamented beam of the IR femtosecond laser

S. Butkus, D. Paipulas, Ž. Viburys, A. Alesenkov, E. Gaižauskas, D. Kaškelytė, M. Barkauskas, V. Sirutkaitis

Proceedings Volume 8972, 897216 (2014) https://doi.org/10.1117/12.2038231

KEYWORDS: Femtosecond phenomena, Glasses, Scanners, Laser welding, Laser drilling, Laser ablation, Laser cutting, Microfabrication, Pulsed laser operation, Soda-lime glass

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Showing 5 of 12 publications

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