A5046297678- Laser Material Processing Techniques
- Laser-Ablation Synthesis of Nanoparticles
- Laser-induced spectroscopy and plasma
- Glass properties and applications
- Laser Design and Applications
- Surface Roughness and Optical Measurements
- Semiconductor Lasers and Optical Devices
- Nonlinear Optical Materials Studies
- Near-Field Optical Microscopy
- Engineering Technology and Methodologies
- Advanced Surface Polishing Techniques
- Ocular and Laser Science Research
- Diamond and Carbon-based Materials Research
- Optical Coatings and Gratings
- Photonic and Optical Devices
- Cultural Heritage Materials Analysis
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced optical system design
- Laser and Thermal Forming Techniques
- Force Microscopy Techniques and Applications
- Photonic Crystals and Applications
- Silicon Nanostructures and Photoluminescence
- Solid State Laser Technologies
- Adhesion, Friction, and Surface Interactions
- Metal and Thin Film Mechanics
ITMO University
2016-2025
Institute of Information Technologies
2012-2020
Institute of Automation and Electrometry
2018-2020
Russian Academy of Sciences
2018-2020
Université Claude Bernard Lyon 1
2017
Centre National de la Recherche Scientifique
2017
Laboratoire Hubert Curien
2017
Moscow Power Engineering Institute
2013
St Petersburg University
1996-2011
Saint Petersburg State University of Economics
2002
Abstract The ultrafast laser-matter interaction is explored to induce new pioneering principles and technologies into the realms of fundamental science industrial production. local thermal melting connection properties laser welding technology offers a novel method for diverse transparent materials, thus having wide range potential applications in aerospace, opto-mechanical systems, sensors, microfluidic, optics, etc. In this comprehensive review, tuning transient electron activation...
A technology of laser-induced coloration metals by surface oxidation is demonstrated. Each color the oxide film corresponds to a technologic chromacity coefficient, which takes into account temperature sample after exposure sequence laser pulses with nanosecond duration and effective time action. The coefficient can be used for calculation regimes development specific on metal. correlation between composition films obtained stainless steel AISI 304 commercial titanium Grade 2 its coordinates shown.
A laser is a very sharp tool, so to speak, for carving materials at the nanoscale, but involves many poorly understood, nonequilibrium processes. The authors' investigation combines an advanced experimental technique, using UV realize much finer structures than possible visible beam, with atomistic-continuum computational method that allows direct comparison of simulations empirical results. This provides both tools and understanding needed develop nanotechnology diverse ends in e.g....
Visual art is an integral part of human life, which, like a mirror, reflects the lifestyle and capabilities generation. Moreover, each epoch contributes to development artistic expression techniques. In this article, we discuss three novel approaches visual design from point view modern photonics laser technology. Laser methods metal coloring are considered regarding their physical nature, ample opportunities for creation different artworks demonstrated.
A comprehensive picture of the nanosecond-laser generation colloidal nanoparticles in liquids is nowadays demand their high-throughput industrial fabrication for diverse perspective biomedical, material science, and optoelectronic applications. In this study, using silicon as an example, we present a self-consistent experimental visualization theoretical description key transient stages during liquids: plasma-mediated injection ablated mass into liquid driving vapor bubble, finalized by...
Light is critical for art. It allows us to see color, and can itself be a tool creating unique pieces of art design. Here we demonstrate that laser multifunctional effective the creation masterpieces, analogous process an artist canvas with classical paints brushes. We investigate interaction between focused irradiation metallic surfaces analyze optical effects in thin oxide films three main artistic operations: color making, multiple changes, erasing managed by nanosecond laser. These...
Unusually high densification ≤26% was obtained without lateral residual stresses within the laser beam waist inside porous glass during its multi-shot femtosecond irradiation, which may induce in related refractive index change ~0.1. Corresponding irradiation regimes, resulting such ultra-densification, decompaction and voids glass, were revealed as a function of pulse energy scanning rate, discussed terms thermal hydrodynamic processes silica network.
The coloration of stainless steel surface due to the formation spatially periodic structures induced by laser pulses nanosecond duration is demonstrated. period microstructures corresponds wavelength, and their orientation angle depends on adjustment polarization. marking algorithm for development authentication patterns presented. Such provide several levels protection against falsification (visual, colorimetric structural) along with high recording speed capability automated reading.
A physical model of laser-induced removal thin absorbing films is proposed. The qualitative concepts melt surface evaporation and motion under the action reactive vapour pressure, tension forces adhesion, support model. basic equations describing process are solved numerically. An analytical parameter phi , characterising relationship between liquid phases removed material, obtained. It shown that, depending on direction inequality <<1 or >>1, phase respectively plays principle role in film...
Peculiarities of the technique laser-induced film transfer (LIFT) are investigated. Possible mechanisms tearing-off and transference films from donor substrate (target) to acceptor one The main fields LIFT applications considered. One most interesting directions applications—decontamination radioactive surfaces—is investigated in detail. peculiarities regimes processing defined.
Laser-activated oxidation of thin metal films by the action pulsed laser radiation is investigated theoretically and experimentally. A physical mathematical model based on Cabrera-Mott theory developed. The basic relations, describing process, are obtained numerically. Four different experimental methods have been used to examine qualitatively quantitatively laser-activated oxidation. results show that irradiation in oxidizing environment may cause buildup oxide layer, which very stable be...
A pulsed fiber laser with a wavelength of 1.06 µm was used to treat commercial pure titanium surface in the air at intensities below ablation threshold provide oxide formation. Laser oxidation results are predicted by chemical thermodynamic method and confirmed experimental techniques (x-ray diffraction, energy dispersive x-ray spectroscopy). For first time, for determining qualitative quantitative phase-chemical composition compounds formed heating air, its applicability is proven. The...
The phase transformations occurring in scale when exposed to nanosecond laser pulses are investigated. initial composition of the and surface layer have been determined. treatment samples was carried out evaporative mode exposure led ablation. Two groups from hot-rolled carbon steel sheets St3 grade (E235, Fe 360) were studied. first group consisted with an a mechanically ground surface. Based on these samples, elemental as well morphological parameters second includes treated pulses. A...
The lifetime of front optical components unprotected from reactor grade plasmas may be very short due to intensive contamination with carbon and beryllium-based materials eroded by the plasma beryllium walls tiles. Deposits result in a significant reduction spectral alterations transmission. In addition, even rather thin transparent deposits can dramatically change shape reflectance spectra, especially for mirrors low reflectivity, such as W or Mo. distortion data obtained various...
We have studied the properties of laser-induced microplasma (LIMP) emerging in ablation a strongly light-absorbing target regime confinement spatial plasma expansion. The LIMP particle temperature is shown to be higher this case than free It found that amplitude pressure pulse an order magnitude open surface case. feasibility writing microstructures on transparent dielectrics with use demonstrated: microlens arrays and different diffraction elements are made.
Mbar-level ablative plume pressures, produced by single-shot femtosecond laser ablation of a dry Ti alloy surface and driving shock waves in air the solid target, were characterized using non-contact broad-band ultrasonic measurements. X-ray diffraction measurements reveal resulting shock-wave induced sub-GPa residual compressive stresses over multi-micrometer depths inside indicating GPa-level on its surface.