TY  - JOUR
AU  - Salatić, Branislav
AU  - Petrović, Suzana
AU  - Peruško, Davor
AU  - Čekada, Miha
AU  - Panjan, Peter
AU  - Pantelić, Dejan
AU  - Jelenković, Branislav
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/858
AB  - The surface morphology of the ablation craters created in the multilayer 10x(Al/Ti)/Si system by nanosecond laser pulses at single- and dual wavelength has been studied experimentally and numerically. A complex multilayer thin film including ten (Al/Ti) bilayers deposited by ion sputtering on Si(1 0 0) substrate to a total thickness of 260 nm were illuminated at different laser irradiance in the range 0.25-3.5 x 10(9)W cm(-2). Single pulse laser irradiation was done at normal incidence in air, with the single wavelength, either at 532 nm or 1064 nm or with both laser light simultaneously in the ratio of 1: 10 for energy per pulse between second harmonic and 1064 nm. Most of the absorbed laser energy was rapidly transformed into heat, producing intensive modifications of composition and morphology on the sample surface. The results show an increase in surface roughness, formation of specific nanostructures, appearance of hydrodynamic features and ablation of surface material with crater formation. Applying a small fraction (10%) of the second harmonic in dual-wavelength pulses, a modification of the 10x(Al/Ti)/Si system by a single laser pulse was reflected in the formation of wider and/or deeper craters. Numerical calculations show that the main physical mechanism in ablation process is normal evaporation without phase explosion. The calculated and experimental results agree relatively well for the whole irradiance range, what makes the model applicable to complex Al/Ti multilayer systems. (C) 2015 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Single- and dual-wavelength laser pulses induced modification in 10x(Al/Ti)/Si multilayer system
VL  - 360
SP  - 559
EP  - 565
DO  - 10.1016/j.apsusc.2015.10.203
ER  - 

@article{
author = "Salatić, Branislav and Petrović, Suzana and Peruško, Davor and Čekada, Miha and Panjan, Peter and Pantelić, Dejan and Jelenković, Branislav",
year = "2016",
abstract = "The surface morphology of the ablation craters created in the multilayer 10x(Al/Ti)/Si system by nanosecond laser pulses at single- and dual wavelength has been studied experimentally and numerically. A complex multilayer thin film including ten (Al/Ti) bilayers deposited by ion sputtering on Si(1 0 0) substrate to a total thickness of 260 nm were illuminated at different laser irradiance in the range 0.25-3.5 x 10(9)W cm(-2). Single pulse laser irradiation was done at normal incidence in air, with the single wavelength, either at 532 nm or 1064 nm or with both laser light simultaneously in the ratio of 1: 10 for energy per pulse between second harmonic and 1064 nm. Most of the absorbed laser energy was rapidly transformed into heat, producing intensive modifications of composition and morphology on the sample surface. The results show an increase in surface roughness, formation of specific nanostructures, appearance of hydrodynamic features and ablation of surface material with crater formation. Applying a small fraction (10%) of the second harmonic in dual-wavelength pulses, a modification of the 10x(Al/Ti)/Si system by a single laser pulse was reflected in the formation of wider and/or deeper craters. Numerical calculations show that the main physical mechanism in ablation process is normal evaporation without phase explosion. The calculated and experimental results agree relatively well for the whole irradiance range, what makes the model applicable to complex Al/Ti multilayer systems. (C) 2015 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Single- and dual-wavelength laser pulses induced modification in 10x(Al/Ti)/Si multilayer system",
volume = "360",
pages = "559-565",
doi = "10.1016/j.apsusc.2015.10.203"
}

Salatić, B., Petrović, S., Peruško, D., Čekada, M., Panjan, P., Pantelić, D.,& Jelenković, B.. (2016). Single- and dual-wavelength laser pulses induced modification in 10x(Al/Ti)/Si multilayer system. in Applied Surface Science
Elsevier., 360, 559-565.
https://doi.org/10.1016/j.apsusc.2015.10.203

Salatić B, Petrović S, Peruško D, Čekada M, Panjan P, Pantelić D, Jelenković B. Single- and dual-wavelength laser pulses induced modification in 10x(Al/Ti)/Si multilayer system. in Applied Surface Science. 2016;360:559-565.
doi:10.1016/j.apsusc.2015.10.203 .

Salatić, Branislav, Petrović, Suzana, Peruško, Davor, Čekada, Miha, Panjan, Peter, Pantelić, Dejan, Jelenković, Branislav, "Single- and dual-wavelength laser pulses induced modification in 10x(Al/Ti)/Si multilayer system" in Applied Surface Science, 360 (2016):559-565,
https://doi.org/10.1016/j.apsusc.2015.10.203 . .

TY  - JOUR
AU  - Salatić, Branislav
AU  - Petrović, Suzana
AU  - Peruško, Davor
AU  - Čekada, Miha
AU  - Jelenković, Branislav
AU  - Pantelić, Dejan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1108
AB  - A study of the effects of laser irradiation on the morphology and composition of Ni/Ti multilayers induced by nanosecond laser pulses at different wavelengths is reported. Irradiation of complex 109(Ni/Ti)/Si sample was done by a Nd:YAG laser which operate at a 1064 nm wavelength, frequency doubled wavelength (532 nm) and dual-wavelength (1064 and 532 nm). The following surface morphological changes were observed: (1) ablation of the thin film during the first laser pulse and (2) appearance of some nanostructures (mosaic structure) in the irradiated region. After action of one pulse, the boundary of damage area was relatively sharp at low pulse energy, whereas it was diffuse after irradiation with higher energy per pulse. The results obtained show that laser irradiation induced mixing between Ni and Ti layers which creates conditions for the formation of intermetallic compounds. A numerical model was used to predict ablation depths and temperatures inside the material during the time. The model prediction shows a close agreement with experimental data.
T2  - Optical and Quantum Electronics
T1  - Laser irradiation of 10x(Ni/Ti)/Si multilayers at different wavelengths
VL  - 48
IS  - 6
DO  - 10.1007/s11082-016-0503-4
ER  - 

@article{
author = "Salatić, Branislav and Petrović, Suzana and Peruško, Davor and Čekada, Miha and Jelenković, Branislav and Pantelić, Dejan",
year = "2016",
abstract = "A study of the effects of laser irradiation on the morphology and composition of Ni/Ti multilayers induced by nanosecond laser pulses at different wavelengths is reported. Irradiation of complex 109(Ni/Ti)/Si sample was done by a Nd:YAG laser which operate at a 1064 nm wavelength, frequency doubled wavelength (532 nm) and dual-wavelength (1064 and 532 nm). The following surface morphological changes were observed: (1) ablation of the thin film during the first laser pulse and (2) appearance of some nanostructures (mosaic structure) in the irradiated region. After action of one pulse, the boundary of damage area was relatively sharp at low pulse energy, whereas it was diffuse after irradiation with higher energy per pulse. The results obtained show that laser irradiation induced mixing between Ni and Ti layers which creates conditions for the formation of intermetallic compounds. A numerical model was used to predict ablation depths and temperatures inside the material during the time. The model prediction shows a close agreement with experimental data.",
journal = "Optical and Quantum Electronics",
title = "Laser irradiation of 10x(Ni/Ti)/Si multilayers at different wavelengths",
volume = "48",
number = "6",
doi = "10.1007/s11082-016-0503-4"
}

Salatić, B., Petrović, S., Peruško, D., Čekada, M., Jelenković, B.,& Pantelić, D.. (2016). Laser irradiation of 10x(Ni/Ti)/Si multilayers at different wavelengths. in Optical and Quantum Electronics, 48(6).
https://doi.org/10.1007/s11082-016-0503-4

Salatić B, Petrović S, Peruško D, Čekada M, Jelenković B, Pantelić D. Laser irradiation of 10x(Ni/Ti)/Si multilayers at different wavelengths. in Optical and Quantum Electronics. 2016;48(6).
doi:10.1007/s11082-016-0503-4 .

Salatić, Branislav, Petrović, Suzana, Peruško, Davor, Čekada, Miha, Jelenković, Branislav, Pantelić, Dejan, "Laser irradiation of 10x(Ni/Ti)/Si multilayers at different wavelengths" in Optical and Quantum Electronics, 48, no. 6 (2016),
https://doi.org/10.1007/s11082-016-0503-4 . .

TY  - JOUR
AU  - Gaković, Biljana M.
AU  - Petrović, Suzana
AU  - Krmpot, Aleksandar J.
AU  - Pantelić, Dejan
AU  - Jelenković, Branislav
AU  - Stratakis, Emmanuel
AU  - Fotakis, C.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/228
AB  - In this work we reported low and high repetition frequency femtosecond laser- induced modifications of tungsten-based thin film. The tungsten-titanium (WTi) thin film, thickness of 190 nm, was deposited by sputtering on single crystal Si (100) wafer. Irradiations were performed in air by linearly polarized and focused femtosecond laser beams with following parameters: (1) pulse duration 160 fs, wavelength 800 nm, laser repetition frequency (LRF) 75 MHz - high LRF, and (2) duration 40 fs, wavelength 800 nm, LRF of 1 kHz - low LRF. The results of femtosecond lasers processing of the WTi thin film revealed laser induced periodical surface structures (LIPSS) in the case of low LRF regime. LIPSSs were formed with different periodicity and different orientation to the laser polarization at the surface: micro-scale LIPSSs with orientation perpendicular to the laser polarization and nano-scale LIPSSs parallel and perpendicular to the laser polarization. After processing of the WTi/Si system in high LRF regime ablation and nanoparticles formation were registered.
T2  - Laser and Particle Beams
T1  - Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film
VL  - 32
IS  - 4
SP  - 613
EP  - 619
DO  - 10.1017/S0263034614000627
ER  - 

@article{
author = "Gaković, Biljana M. and Petrović, Suzana and Krmpot, Aleksandar J. and Pantelić, Dejan and Jelenković, Branislav and Stratakis, Emmanuel and Fotakis, C.",
year = "2014",
abstract = "In this work we reported low and high repetition frequency femtosecond laser- induced modifications of tungsten-based thin film. The tungsten-titanium (WTi) thin film, thickness of 190 nm, was deposited by sputtering on single crystal Si (100) wafer. Irradiations were performed in air by linearly polarized and focused femtosecond laser beams with following parameters: (1) pulse duration 160 fs, wavelength 800 nm, laser repetition frequency (LRF) 75 MHz - high LRF, and (2) duration 40 fs, wavelength 800 nm, LRF of 1 kHz - low LRF. The results of femtosecond lasers processing of the WTi thin film revealed laser induced periodical surface structures (LIPSS) in the case of low LRF regime. LIPSSs were formed with different periodicity and different orientation to the laser polarization at the surface: micro-scale LIPSSs with orientation perpendicular to the laser polarization and nano-scale LIPSSs parallel and perpendicular to the laser polarization. After processing of the WTi/Si system in high LRF regime ablation and nanoparticles formation were registered.",
journal = "Laser and Particle Beams",
title = "Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film",
volume = "32",
number = "4",
pages = "613-619",
doi = "10.1017/S0263034614000627"
}

Gaković, B. M., Petrović, S., Krmpot, A. J., Pantelić, D., Jelenković, B., Stratakis, E.,& Fotakis, C.. (2014). Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film. in Laser and Particle Beams, 32(4), 613-619.
https://doi.org/10.1017/S0263034614000627

Gaković BM, Petrović S, Krmpot AJ, Pantelić D, Jelenković B, Stratakis E, Fotakis C. Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film. in Laser and Particle Beams. 2014;32(4):613-619.
doi:10.1017/S0263034614000627 .

Gaković, Biljana M., Petrović, Suzana, Krmpot, Aleksandar J., Pantelić, Dejan, Jelenković, Branislav, Stratakis, Emmanuel, Fotakis, C., "Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film" in Laser and Particle Beams, 32, no. 4 (2014):613-619,
https://doi.org/10.1017/S0263034614000627 . .

TY  - JOUR
AU  - Petrović, Suzana
AU  - Peruško, Davor
AU  - Salatić, Branislav
AU  - Bogdanović-Radović, Ivančica
AU  - Panjan, Peter
AU  - Gaković, Biljana M.
AU  - Pantelić, Dejan
AU  - Trtica, Milan
AU  - Jelenković, Branislav
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5661
AB  - A study of morphological and composition changes of the (8(Al/Ti)/Si) system induced by laser pulses in different ambient conditions is presented. The effects of an Er, Yb, Cr-Glass laser, operating at 1540 nm wavelength with pulse duration of 44 ns, on a complex target were investigated. Irradiation of 8(Al/Ti)/Si was carried out at intensities of 5.9 and 9.5 x 10(11) W m(-2) in air, water and ethanol. The laser-induced morphological and composition modifications have shown dependence on applied intensities, number of laser pulses and ambient conditions. The following morphological changes were observed: (i) intense surface melting of the thin film and Si-substrate; (ii) ablation/exfoliation of the 8(Al/Ti) multilayer thin film from Si, (iii) appearance of hydrodynamic features such as resolidified material, and (iv) formation of crater at multi-pulse action. The formation of parallel periodic surface structure was only occurring in single pulse air-assisted modification. Analysis of the composition revealed that laser modification induced intermixing between the components of individual Al and Ti layers with potential formation of AlTi intermetallic compounds. (C) 2013 Elsevier Ltd. All rights reserved.
T2  - Optics and Laser Technology
T1  - Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions
VL  - 54
SP  - 22
EP  - 29
DO  - 10.1016/j.optlastec.2013.04.030
ER  - 

@article{
author = "Petrović, Suzana and Peruško, Davor and Salatić, Branislav and Bogdanović-Radović, Ivančica and Panjan, Peter and Gaković, Biljana M. and Pantelić, Dejan and Trtica, Milan and Jelenković, Branislav",
year = "2013",
abstract = "A study of morphological and composition changes of the (8(Al/Ti)/Si) system induced by laser pulses in different ambient conditions is presented. The effects of an Er, Yb, Cr-Glass laser, operating at 1540 nm wavelength with pulse duration of 44 ns, on a complex target were investigated. Irradiation of 8(Al/Ti)/Si was carried out at intensities of 5.9 and 9.5 x 10(11) W m(-2) in air, water and ethanol. The laser-induced morphological and composition modifications have shown dependence on applied intensities, number of laser pulses and ambient conditions. The following morphological changes were observed: (i) intense surface melting of the thin film and Si-substrate; (ii) ablation/exfoliation of the 8(Al/Ti) multilayer thin film from Si, (iii) appearance of hydrodynamic features such as resolidified material, and (iv) formation of crater at multi-pulse action. The formation of parallel periodic surface structure was only occurring in single pulse air-assisted modification. Analysis of the composition revealed that laser modification induced intermixing between the components of individual Al and Ti layers with potential formation of AlTi intermetallic compounds. (C) 2013 Elsevier Ltd. All rights reserved.",
journal = "Optics and Laser Technology",
title = "Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions",
volume = "54",
pages = "22-29",
doi = "10.1016/j.optlastec.2013.04.030"
}

Petrović, S., Peruško, D., Salatić, B., Bogdanović-Radović, I., Panjan, P., Gaković, B. M., Pantelić, D., Trtica, M.,& Jelenković, B.. (2013). Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions. in Optics and Laser Technology, 54, 22-29.
https://doi.org/10.1016/j.optlastec.2013.04.030

Petrović S, Peruško D, Salatić B, Bogdanović-Radović I, Panjan P, Gaković BM, Pantelić D, Trtica M, Jelenković B. Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions. in Optics and Laser Technology. 2013;54:22-29.
doi:10.1016/j.optlastec.2013.04.030 .

Petrović, Suzana, Peruško, Davor, Salatić, Branislav, Bogdanović-Radović, Ivančica, Panjan, Peter, Gaković, Biljana M., Pantelić, Dejan, Trtica, Milan, Jelenković, Branislav, "Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions" in Optics and Laser Technology, 54 (2013):22-29,
https://doi.org/10.1016/j.optlastec.2013.04.030 . .