TY  - JOUR
AU  - Smirnov, Nikita A.
AU  - Kudryashov, Sergey I.
AU  - Danilov, Pavel A.
AU  - Rudenko, Andrey A.
AU  - Gaković, Biljana M.
AU  - Milovanović, Dubravka S.
AU  - Ionin, Andrey A.
AU  - Nastulyavichus, Alena A.
AU  - Umanskaya, S. F.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8412
AB  - Single-pulse microprocessing of a steel surface with a variable pulse width (0.3-12.3 ps) and a wavelength of 515 nm was performed. The morphology of the craters was visualized by a scanning electron microscope and an optical profilometer. The nonmonotonic behavior of ablation thresholds with a minimum at ≈1.5 ps, due to achieving the electron-phonon relaxation time of the absorbed energy in the steel was revealed. It is shown that, with an increase in the pulse width in the considered width range, the efficiency of the ablation decreases by a factor of 2, which is explained by the partial transition from the phase explosion to the surface evaporation. © 2019 Astro Ltd.
T2  - Laser Physics Letters
T1  - Microprocessing of a steel surface by single pulses of variable width
VL  - 16
IS  - 5
SP  - 056002
DO  - 10.1088/1612-202X/ab0c85
ER  - 

@article{
author = "Smirnov, Nikita A. and Kudryashov, Sergey I. and Danilov, Pavel A. and Rudenko, Andrey A. and Gaković, Biljana M. and Milovanović, Dubravka S. and Ionin, Andrey A. and Nastulyavichus, Alena A. and Umanskaya, S. F.",
year = "2019",
abstract = "Single-pulse microprocessing of a steel surface with a variable pulse width (0.3-12.3 ps) and a wavelength of 515 nm was performed. The morphology of the craters was visualized by a scanning electron microscope and an optical profilometer. The nonmonotonic behavior of ablation thresholds with a minimum at ≈1.5 ps, due to achieving the electron-phonon relaxation time of the absorbed energy in the steel was revealed. It is shown that, with an increase in the pulse width in the considered width range, the efficiency of the ablation decreases by a factor of 2, which is explained by the partial transition from the phase explosion to the surface evaporation. © 2019 Astro Ltd.",
journal = "Laser Physics Letters",
title = "Microprocessing of a steel surface by single pulses of variable width",
volume = "16",
number = "5",
pages = "056002",
doi = "10.1088/1612-202X/ab0c85"
}

Smirnov, N. A., Kudryashov, S. I., Danilov, P. A., Rudenko, A. A., Gaković, B. M., Milovanović, D. S., Ionin, A. A., Nastulyavichus, A. A.,& Umanskaya, S. F.. (2019). Microprocessing of a steel surface by single pulses of variable width. in Laser Physics Letters, 16(5), 056002.
https://doi.org/10.1088/1612-202X/ab0c85

Smirnov NA, Kudryashov SI, Danilov PA, Rudenko AA, Gaković BM, Milovanović DS, Ionin AA, Nastulyavichus AA, Umanskaya SF. Microprocessing of a steel surface by single pulses of variable width. in Laser Physics Letters. 2019;16(5):056002.
doi:10.1088/1612-202X/ab0c85 .

Smirnov, Nikita A., Kudryashov, Sergey I., Danilov, Pavel A., Rudenko, Andrey A., Gaković, Biljana M., Milovanović, Dubravka S., Ionin, Andrey A., Nastulyavichus, Alena A., Umanskaya, S. F., "Microprocessing of a steel surface by single pulses of variable width" in Laser Physics Letters, 16, no. 5 (2019):056002,
https://doi.org/10.1088/1612-202X/ab0c85 . .

TY  - JOUR
AU  - Kudryashov, Sergey I.
AU  - Smirnov, Nikita A.
AU  - Gaković, Biljana M.
AU  - Milovanović, Dubravka S.
AU  - Bezhanov, Stanislav G.
AU  - Uryupin, Sergey A.
AU  - Ionin, Andrey A.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8535
AB  - The dependences of the depth of single-pulse ablation of the steel surface on the energy density of ultrashort laser pulses (0.3–12 ps) with a wavelength of 515 nm have the form different from the usual logarithmic one for linear absorption of radiation. Since the density of states of free conduction electrons in the s band is low, and the d band of strongly bound electrons with a high density of states is located around the Fermi level, these dependences have been approximated within the two-photon absorption model. The two-photon absorption coefficient increases almost linearly with the duration of laser pulses, which indicates the saturation of absorption and allows estimating the corresponding parameters of the electronic subsystem. © 2019, Pleiades Publishing, Inc.
T2  - JETP Letters
T1  - Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses
VL  - 110
IS  - 2
SP  - 107
EP  - 110
DO  - 10.1134/S0021364019140091
ER  - 

@article{
author = "Kudryashov, Sergey I. and Smirnov, Nikita A. and Gaković, Biljana M. and Milovanović, Dubravka S. and Bezhanov, Stanislav G. and Uryupin, Sergey A. and Ionin, Andrey A.",
year = "2019",
abstract = "The dependences of the depth of single-pulse ablation of the steel surface on the energy density of ultrashort laser pulses (0.3–12 ps) with a wavelength of 515 nm have the form different from the usual logarithmic one for linear absorption of radiation. Since the density of states of free conduction electrons in the s band is low, and the d band of strongly bound electrons with a high density of states is located around the Fermi level, these dependences have been approximated within the two-photon absorption model. The two-photon absorption coefficient increases almost linearly with the duration of laser pulses, which indicates the saturation of absorption and allows estimating the corresponding parameters of the electronic subsystem. © 2019, Pleiades Publishing, Inc.",
journal = "JETP Letters",
title = "Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses",
volume = "110",
number = "2",
pages = "107-110",
doi = "10.1134/S0021364019140091"
}

Kudryashov, S. I., Smirnov, N. A., Gaković, B. M., Milovanović, D. S., Bezhanov, S. G., Uryupin, S. A.,& Ionin, A. A.. (2019). Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses. in JETP Letters, 110(2), 107-110.
https://doi.org/10.1134/S0021364019140091

Kudryashov SI, Smirnov NA, Gaković BM, Milovanović DS, Bezhanov SG, Uryupin SA, Ionin AA. Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses. in JETP Letters. 2019;110(2):107-110.
doi:10.1134/S0021364019140091 .

Kudryashov, Sergey I., Smirnov, Nikita A., Gaković, Biljana M., Milovanović, Dubravka S., Bezhanov, Stanislav G., Uryupin, Sergey A., Ionin, Andrey A., "Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses" in JETP Letters, 110, no. 2 (2019):107-110,
https://doi.org/10.1134/S0021364019140091 . .