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This article is cited in 4 scientific papers (total in 4 papers)
OPTICS AND NUCLEAR PHYSICS
Dependence of the two-photon absorption coefficient of steel on the pulse duration during its ablation by femto- and picosecond laser pulses
S. I. Kudryashovab, N. A. Smirnova, B. Gakovicc, D. Milovanovicc, S. G. Bezhanovba, S. A. Uryupinab, A. A. Ionina a Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia
b Moscow Engineering Physics Institute, National Research Nuclear University MEPhI, Moscow, Russia
c Institute of Nuclear Sciences VINČA, Belgrade University, Belgrade, Republic of Serbia
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.
Received: 14.05.2019 Revised: 27.05.2019 Accepted: 28.05.2019
Citation:
S. I. Kudryashov, N. A. Smirnov, B. Gakovic, D. Milovanovic, S. G. Bezhanov, S. A. Uryupin, A. A. Ionin, “Dependence of the two-photon absorption coefficient of steel on the pulse duration during its ablation by femto- and picosecond laser pulses”, Pis'ma v Zh. Èksper. Teoret. Fiz., 110:2 (2019), 90–94; JETP Letters, 110:2 (2019), 107–110
Linking options:
https://www.mathnet.ru/eng/jetpl5953 https://www.mathnet.ru/eng/jetpl/v110/i2/p90
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Abstract page: | 128 | Full-text PDF : | 18 | References: | 28 | First page: | 3 |
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