A5027597767- Laser Material Processing Techniques
- Laser-induced spectroscopy and plasma
- Laser-Ablation Synthesis of Nanoparticles
- Diamond and Carbon-based Materials Research
- Nonlinear Optical Materials Studies
- Laser-Matter Interactions and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Silicon Nanostructures and Photoluminescence
- Ocular and Laser Science Research
- Advanced Fiber Laser Technologies
- Plasmonic and Surface Plasmon Research
- Ion-surface interactions and analysis
- Laser Design and Applications
- Advanced Surface Polishing Techniques
- Photonic and Optical Devices
- Nanoparticles: synthesis and applications
- Laser-Plasma Interactions and Diagnostics
- Metal and Thin Film Mechanics
- Photonic Crystals and Applications
- Orbital Angular Momentum in Optics
- Petroleum Processing and Analysis
- Enhanced Oil Recovery Techniques
- Spectroscopy Techniques in Biomedical and Chemical Research
- High-pressure geophysics and materials
- Solid State Laser Technologies
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2016-2025
Zarubezhneft
2016-2025
Bauman Moscow State Technical University
2024-2025
Moscow State Technological University
2024
Ural Federal University
2022-2024
Gubkin Russian State University of Oil and Gas
2024
Chuvash State University
2021-2022
ITMO University
2015-2021
Russian Academy of Sciences
2009-2021
All-Russian Scientific Research Institute of Refrigeration Industry
2021
We propose a novel approach for efficient tuning of optical properties high refractive index subwavelength nanoparticle with magnetic Mie-type resonance by means femtosecond laser irradiation. This concept is based on ultrafast photoinjection dense (>1020 cm–3) electron–hole plasma within such nanoparticle, drastically changing its transient dielectric permittivity. allows manipulation both electric and responses, resulting in dramatic changes scattering diagram cross section. experimentally...
Donut-shaped laser radiation, carrying orbital angular momentum, namely optical vortex, was recently shown to provide vectorial mass transfer, twisting transiently molten material and producing chiral micro-scale structures on surfaces of different bulk materials upon their resolidification. In this paper, we show that at high-NA focusing nanosecond vortices can produce nanoneedles (nanojets) variable size thin films such plasmonic materials, as silver gold films, covering thermally...
In this work the formation of laser-induced periodic surface structures (LIPSS) on a titanium upon irradiation by linearly polarized femtosecond (fs) laser pulses with repetition rate 1 kHz in air environment was studied experimentally. particular, dependence high-spatial-frequency-LIPSS (HSFL) characteristics various parameters: fluence, pulse number, wavelength (800 nm and 400 nm), duration (10 fs - 550 fs), polarization detail. comparison low-spatial-frequency-LIPSS (LSFL), HSFL emerge at...
Optically generated electron–hole plasma in high-index dielectric nanostructures was demonstrated as a means of tuning their optical properties. However, until now an ultrafast operation regime such plasma-driven has not been attained. Here, we perform pump–probe experiments with resonant silicon nanoparticles and report on dense generation near the magnetic dipole resonance (about 2.5 ps) relaxation rate. On basis experimental results, develop analytical model describing transient response...
Abstract Various basic mechanisms of material surface ablation produced by ultrashort laser pulses are considered in the order increasing supplied fluence: low-threshold ultrafast plasma expansion at electron dynamics stage, spallative ablation, and explosive hydrodynamic supercritical fluid expansion, including related sequence relaxation processes.
Surface-enhanced Raman scattering (SERS) and surface-enhanced photoluminescence (SEPL) are emerging as versatile widespread methods for biological, chemical, physical characterization in close proximity of nanostructured surfaces plasmonic materials. Meanwhile, single-step, facile, cheap, green technologies large-scale fabrication efficient SERS or SEPL substrates, routinely demonstrating both broad response high enhancement characteristics, still missing. In this research, single-pulse...
In this paper, the influence of pulse duration on ablation threshold and incubation coefficient was investigated for three different types materials: metal (copper), semiconductor (silicon) biopolymer (gelatin). Ablation values coefficients have been measured multiple Ti:sapphire laser pulses (3 to 1000 pulses) four durations (10, 30, 250 550 fs). The fluence determined by extrapolation curves from squared crater diameter versus plots. For copper silicon, experiments were conducted in vacuum...
This paper investigates aquathermolysis of heavy oil in carbonate reservoir rocks from Boca de Jaruco, which is developed by the cyclic steam stimulation method. The nickel-based catalyst precursor was introduced order to intensify conversion processes components. active form such catalysts—nickel sulfides—are achieved after treatment crude at conditions. experiments were carried out on a rock sample extracted depth 1900 m. Changes composition and structure identified using SARA-analysis,...
In the present work, we studied catalytic performance of an oil-soluble nickel-based catalyst during aquathermolysis oil-saturated crushed cores from Boca de Jaruco extra-heavy oil field. The decomposition nickel tallate and some aspects in-situ transformation given precursor under steam injection conditions were investigated in a high-pressure batch reactor using XRD SEM analysis methods. changes physical chemical properties core extracts after process with various duration gas...
The nonlinear absorption of ultrashort laser pulses with intensities 0.17–1.7 TW/cm 2 at an intrinsic two-photon wavelength 4673 nm in type IIb diamond has been studied experimentally. It shown that the main mechanism sample is a coefficient β = (72 ± 7) cm/TW. Transmission microspectroscopy, visible photoluminescence, and infrared Fourier-transform microspectroscopy have demonstrated possibility laser-induced transformation nitrogen impurity centers synthetic Ib higher radiation intensities.
Multi-sector broadband diffractive optical elements (DOEs) were designed and fabricated from fused silica for high-efficiency multiplexing of femtosecond nanosecond Gaussian laser beams into multiple (up to one 100) optically tunable microbeams with increased high-numerical aperture (NA) focal depths. Various DOE-related issues, such as high-NA focusing, pulsewidth, DOE symmetry-dependent heat conduction effects, well the corresponding spatial resolution, discussed in context high-throughput...
Femtosecond laser treatment of a glass surface was used to fabricate multimodal roughness having regular ripples with period few micrometers decorated by aggregates nearly spherical nanoparticles. UV–ozone followed chemisorption the appropriate functional fluorosilanes onto textured makes it possible superhydrophobic coating specific resistance on order petaohms surface. The main advantage fabricated under severe operating conditions abrasion loads is significant durability its...
Hollow reduced-symmetry resonant plasmonic nanostructures possess pronounced tunable optical resonances in the UV-vis-IR range, being a promising platform for advanced nanophotonic devices. However, present fabrication approaches require several consecutive technological steps to produce such nanostructures, making their large-scale rather time-consuming and expensive. Here, we report on direct single-step of arrays hollow parabolic- cone-shaped nanovoids silver gold thin films, using...
Ultrafast deposition of laser energy into noble-metal films yields irreversible mass redistribution and resolidified nanostructures with hidden features, which can strongly affect the optical response that is harnessed for applications in plasmonics nonlinear optics. A combination three surface probes reveals three-dimensional distributions induced by pulse, simulations show spatiotemporal dynamics nanoscale hydrodynamic flows. This approach allows quantitative prediction film thickness,...
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...