Dr. Ivan G. Lebo Profile

Dr. Ivan G. Lebo

at PN Lebedev Physical Institute

SPIE Involvement:

Author

Publications (17)

Proceedings Article | 2 July 2007 Paper

Laser annealing of ferroelectric thin films

I. Lebo, S. Kudryashov, K. Vorotilov, A. Sigov, O. Zhigalina, O. Zhitkova, V. Zvorykin

Proceedings Volume 6732, 67320Q (2007) https://doi.org/10.1117/12.751914

KEYWORDS: Annealing, Acoustics, Thin films, Crystals, Pulsed laser operation, Transducers, Laser crystals, Semiconducting wafers, Process modeling, Statistical modeling

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Proceedings Article | 26 April 2006 Paper

Numerical modeling of laser annealing of thin electroceramic materials

I. G. Lebo

Proceedings Volume 6161, 61610F (2006) https://doi.org/10.1117/12.675042

KEYWORDS: Annealing, Numerical modeling, Crystals, Laser applications, Thin films, Laser crystals, Optical simulations, Ferroelectric materials, Microelectronics, Transparency

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Proceedings Article | 20 September 2004 Paper

High-energy GARPUN KrF laser interaction with solid and thin-foil targets in ambient air

Vladimir Zvorykin, Valerii Bakaev, Dimitri Batani, Ivan Lebo, A. Levchenko, Gleb Sychugov, Vladimir Tishkin, D. Zayarnyi

Proceedings Volume 5448, (2004) https://doi.org/10.1117/12.547442

KEYWORDS: Plasma, Solids, Pulsed laser operation, Ionization, Interfaces, Thin films, Absorption, Iron, Argon, Numerical simulations

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Hydrodynamic regimes of KrF laser interaction with solid and thin-film targets in atmospheric and reduced pressure air were investigated at high-energy GARPUN installation. These experiments were performed with 100-J, 100-ns laser pulses in planar focusing geometry and compared with numerical simulations with ATLANT code to verify the concept of laser-driven shock tube (LST), which could accelerate a gas to hypersonic velocity and produce strong shock waves (SW). Laser beam was focused by a prism raster optical system that provided very uniform intensity distribution at moderate laser intensities q ≤ 1 GW/cm² over a square spot of ~ 1-cm size. Dynamics of laser-produced plasma and SW in a surrounding gas were investigated by means of high-speed photo-chronograph and streak camera in combination with shadow or schlieren techniques, time and space resolved spectroscopy in a visible spectral range. Both experiments and simulations confirmed that target evaporation and blow-up of expanding plasma are the main mechanisms of UV laser-target interaction in a surrounding gas. Planar shock waves with velocities up to 7 km/s towards the laser beam were observed in a normal density air and up to 30 km/s in a rarefied air. Acceleration of thin CH films of 1 to 50-μm thickness was investigated both in a free-expansion and plasma-confined regimes with the highest achieved velocities up to 4 km/s. The SW damping law in a free space independently on laser intensity and air pressure could be approximated by a power law x ~ tⁿ with a power indexes n₁ = 0.85 - 0.95 at the initial stage and n₂ = 0.5 - 0.6 later, when a distance of the SW front from a target became comparable with a size of the irradiated spot. Instability growth at contact interfaces between ablative plasma and accelerated film, as well as between plasma and compressed air were observed and compared for various initial irradiation non-uniformities. They were introduced by a grid, which was set in front of the film target.

Proceedings Article | 10 June 2004 Paper

Two-dimensional code ATLANT-HE for simulation of laser-plasma interaction with allowance for hot electron generation and transport

Ivan Lebo, Alexey Iskakov, Nikolai Demchenko, Jiri Limpouch, Vladislav Rozanov, Vladimir Tishkin

Proceedings Volume 5482, (2004) https://doi.org/10.1117/12.558767

KEYWORDS: Absorption, Plasma, Optical simulations, Electron transport, Algorithm development, Picosecond phenomena, Explosives, Mathematical modeling, Foam, Laser development

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Proceedings Article | 12 December 2003 Paper

2D-Lagrangian code LATRANT for simulation of radiation gas dynamic problems

Elena Aristova, Alexey Iskakov, Ivan Lebo, Vladimir Tishkin

Proceedings Volume 5228, (2003) https://doi.org/10.1117/12.536544

KEYWORDS: Spherical lenses, Ions, Absorption, X-rays, Aluminum, Optical simulations, Plasma, Algorithm development, Neodymium, Glasses

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Proceedings Article | 12 December 2003 Paper

2D Lagrangian code ATLANT-HE for simulation of laser-plasma interaction with allowance for hot electron generation and transport

Alexey Iskakov, Nikolai Demchenko, Ivan Lebo, Vladislav Rozanov, Vladimir Tishkin

Proceedings Volume 5228, (2003) https://doi.org/10.1117/12.536552

KEYWORDS: Absorption, Electron transport, Optical simulations, Plasma, Algorithm development, Picosecond phenomena, Explosives, Mathematical modeling, Laser development, Electromagnetism

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Proceedings Article | 12 December 2003 Paper

Numerical modeling of laser target experiments at GARPUN and PICO installations

Ivan Lebo, Alexey Iskakov, Yuri Mikhailov, Vladislav Rozanov, Alexandr Starodub, Gleb Sklizkov, Vladimir Tishkin, Vladimir Zvorykin

Proceedings Volume 5228, (2003) https://doi.org/10.1117/12.536561

KEYWORDS: Pulsed laser operation, Ionization, Absorption, Solids, Iron, Numerical modeling, Wave propagation, Plasma, Kerr effect, Aluminum

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Proceedings Article | 12 December 2003 Paper

GARPUN KrF-laser-target experiments and numerical simulations on the concept of laser-driven shock tube

Vladimir Zvorykin, Valerii Bakaev, Alexey Iskakov, Ivan Lebo, Gleb Sychugov, Vladimir Tishkin

Proceedings Volume 5228, (2003) https://doi.org/10.1117/12.536557

KEYWORDS: Liquids, Interfaces, Pulsed laser operation, Numerical simulations, Gases, Plasma, Solids, Wave propagation, Ultraviolet radiation, Aerospace engineering

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