A5082316168- Laser Material Processing Techniques
- Laser-Ablation Synthesis of Nanoparticles
- Nonlinear Optical Materials Studies
- Laser-induced spectroscopy and plasma
- Gold and Silver Nanoparticles Synthesis and Applications
- Silicon Nanostructures and Photoluminescence
- Plasmonic and Surface Plasmon Research
- Diamond and Carbon-based Materials Research
- Nanoparticles: synthesis and applications
- Laser-Matter Interactions and Applications
- Ion-surface interactions and analysis
- Bacterial biofilms and quorum sensing
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Quantum Dots Synthesis And Properties
- Orbital Angular Momentum in Optics
- Thin-Film Transistor Technologies
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Ocular and Laser Science Research
- Advanced Surface Polishing Techniques
- Advanced Fiber Laser Technologies
- Covalent Organic Framework Applications
- Biosensors and Analytical Detection
- Laser Applications in Dentistry and Medicine
DuPont (United States)
2023
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2013-2021
National Research Nuclear University MEPhI
2014-2019
Prokhorov General Physics Institute
2014-2018
University of Southern California
2018
Stanford University
2018
Russian Academy of Sciences
2013-2015
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,...
The antibacterial properties of silicon nanoparticles with Gram-positive and Gram-negative bacteria were demonstrated. prepared laser ablation in various liquids (distilled water, isopropyl alcohol) using a nanosecond laser. Optical scanning electron microscopy methods used for the sample characterization. presence singlet oxygen other reactive species on surface nanoparticles, leading to oxidative damage bacterial membranes further death bacteria, was considered possible mechanism this action.
Large-scale surface nanopatterning of a commercial silicon (Si) wafer in the form regular 1D arrays high-aspect-ratio vertical nanosheets (NSs) for antifouling and other potential promising optoelectronic, nanophotonic, sensing applications was performed via multishot picosecond IR-laser ablation under 5-mm-thick carbon disulfide liquid layer. Specifically, nanopatterned layer demonstrates broad ultralow mid-IR transmittance high content sulfur, carbon, even oxygen modified submicron-thick...
The sub and near-threshold topographic signatures of the spallation nanometer-thick melt layers during single-shot femtosecond laser ablation bulk aluminum gold were experimentally observed for first time, using scanning electron microscopy with high spatial resolution. novel ablative nanofeatures—sub-threshold boiling nanopits, partially detached ultrathin solidified layer, lamellar surface structure under layer along spallative crater border, as well foam-like nanostructure bottom—indicate...
We have demonstrated for the first time that an array of nanoantennas (central nanotips inside sub-micrometer pits) on aluminum surface, fabricated using a specific double-pulse femtosecond laser irradiation scheme, results in 28-fold enhancement non-linear (three-photon) electron photoemission yield, driven by third intense IR pulse. The supporting numerical electrodynamic modeling indicates emission is increased not owing to larger effective but due instant local electromagnetic field near...
Single-shot IR femtosecond-laser ablation of gold surfaces in ambient air and liquid isopropyl alcohol was studied by scanning electron microscopy characterization crater topographies time-resolved optical emission spectroscopy ablative plumes regimes, typical for non-filamentary non-fragmentation laser production nanoparticle sols. Despite one order magnitude shorter (few nanoseconds) lifetimes almost two orders lower intensities the quenched plume at same peak fluence, craters dry wet...
Mechanisms of formation sub- and micrometre-scale holes in thin silver chromium films variable thickness by tightly-focused single nanosecond IR laser pulses with fluences the range are studied means optical scanning electron microscopy. At minimal above , micrometre ( radius) produced these films, accompanying lateral heat conduction film during pump pulse, cavitation at metallic/glass interface subsequent explosive removal molten film. much larger formed as a result its heating erosive...