Anton Rudenko
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View article: Model of <i>in-situ</i> focusing of extreme ultraviolet high-order harmonics from a nanostructured MgO surface
Model of <i>in-situ</i> focusing of extreme ultraviolet high-order harmonics from a nanostructured MgO surface Open
We present a numerical model for the in-situ generation and focusing of extreme-ultraviolet (XUV) high harmonics via a Fresnel zone plate etched into a dielectric (MgO) surface. Our simulations show that propagation of the intense infrared…
View article: Chiral High-Harmonic Generation in Metasurfaces
Chiral High-Harmonic Generation in Metasurfaces Open
High-harmonic generation (HHG) provides the only source of attosecond pulses -- currently the shortest accessible time intervals, and it is employed as the only table-top source of light in extreme UV and soft X-ray spectral regions. Chira…
View article: Ionization clamping in ultrafast optical breakdown of transparent solids
Ionization clamping in ultrafast optical breakdown of transparent solids Open
We formulate a multi-physics model to describe the nonlinear propagation of a femtosecond, near-infrared, tightly focused laser pulse in a transparent dielectric. The application of our model to the case of bulk sapphire shows that even un…
View article: High-harmonic generation from a subwavelength dielectric resonator
High-harmonic generation from a subwavelength dielectric resonator Open
Higher-order optical harmonics entered the realm of nanostructured solids being observed recently in optical gratings and metasurfaces with a subwavelength thickness. Structuring materials at the subwavelength scale allows us toresonantly …
View article: Boosted Spontaneous Formation of High‐Aspect Ratio Nanopeaks on Ultrafast Laser‐Irradiated Ni Surface
Boosted Spontaneous Formation of High‐Aspect Ratio Nanopeaks on Ultrafast Laser‐Irradiated Ni Surface Open
The capacity to synthesize and design highly intricated nanoscale objects of different sizes, surfaces, and shapes dramatically conditions the development of multifunctional nanomaterials. Ultrafast laser technology holds great promise as …
View article: Observation of Ultrafast Self-Action Effects in Quasi-BIC Resonant Metasurfaces
Observation of Ultrafast Self-Action Effects in Quasi-BIC Resonant Metasurfaces Open
High-index dielectric metasurfaces can support sharp optical resonances enabled by the physics of bound states in the continuum (BICs) often manifested in experiments as quasi-BIC resonances. They provide a way to enhance light-matter inte…
View article: Real-time imaging of laser-driven nanoplasma expansion.
Real-time imaging of laser-driven nanoplasma expansion. Open
The free expansion of a planar plasma surface is a fundamental non-equilibrium process relevant for various fields but as-yet experimentally still difficult to capture. The significance of the associated spatiotemporal plasma motion ranges…
View article: Genesis of Nanogratings in Silica Bulk via Multipulse Interplay of Ultrafast Photo‐Excitation and Hydrodynamics
Genesis of Nanogratings in Silica Bulk via Multipulse Interplay of Ultrafast Photo‐Excitation and Hydrodynamics Open
Structuring below diffraction limit is key to developing new laser processing technologies as well as to understanding light‐induced processes on mesoscopic scales, notably self‐organization. Here, an advanced numerical perspective on the …
View article: Self-Organization Regimes Induced by Ultrafast Laser on Surfaces in the Tens of Nanometer Scales
Self-Organization Regimes Induced by Ultrafast Laser on Surfaces in the Tens of Nanometer Scales Open
A laser-irradiated surface is the paradigm of a self-organizing system, as coherent, aligned, chaotic, and complex patterns emerge at the microscale and even the nanoscale. A spectacular manifestation of dissipative structures consists of …
View article: Ultrafast laser nanopatterning of metals below 100 nm
Ultrafast laser nanopatterning of metals below 100 nm Open
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View article: Sub-100nm Surface Self-organization By Ultrafast Laser Irradiation
Sub-100nm Surface Self-organization By Ultrafast Laser Irradiation Open
Driven by local field enhancements enhancing feedback, novel structuring features demonstrate the potential of ultrafast laser for the fabrication of self-organized patterns with a periodic topography well below the diffraction limit. We r…
View article: Mixing periodic topographies and structural patterns on silicon surfaces mediated by ultrafast photoexcited charge carriers
Mixing periodic topographies and structural patterns on silicon surfaces mediated by ultrafast photoexcited charge carriers Open
Ultrafast laser irradiation of silicon can significantly modify charge densities and optical indices, impacting the formation and the development of nanoscale-arranged periodic structures. Photoexcitation degree as well as thermodynamic, h…
View article: Tunable Near‐ to Far‐Infrared Optical Breakdown in Nonlinear Interactions of Ultrashort Laser Pulses with Water Microdroplets in Ambient Air
Tunable Near‐ to Far‐Infrared Optical Breakdown in Nonlinear Interactions of Ultrashort Laser Pulses with Water Microdroplets in Ambient Air Open
Intense laser pulse propagation results in excitation and partial or complete ionization of aerosols and water microdroplets in the atmosphere. While the problems of light scattering by particles and laser‐induced breakdown in bulk water h…
View article: Insights into Ultrashort Laser-Driven Au:TiO<sub>2</sub> Nanocomposite Formation
Insights into Ultrashort Laser-Driven Au:TiO<sub>2</sub> Nanocomposite Formation Open
International audience
View article: Plasma-free water droplet shattering by long-wave infrared ultrashort pulses for efficient fog clearing
Plasma-free water droplet shattering by long-wave infrared ultrashort pulses for efficient fog clearing Open
High-power lasers can be used to clear a foggy or cloudy atmosphere by exploding and shattering water microdroplets into smaller fragments. The physics of laser–droplet interaction strongly depend on the excitation wavelength and pulse dur…
View article: Laser-Generated Ag Nanoparticles in Mesoporous TiO<sub>2</sub> Films: Formation Processes and Modeling-Based Size Prediction
Laser-Generated Ag Nanoparticles in Mesoporous TiO<sub>2</sub> Films: Formation Processes and Modeling-Based Size Prediction Open
Controlling the formation of nanoparticles (NPs) by direct laser writing ensures an efficient way of engineering the optical responses of nanocomposite materials through adjusting laser parameters such as power, focusing, and writing speed…
View article: Self-organization of surfaces on the nanoscale by topography-mediated selection of quasi-cylindrical and plasmonic waves
Self-organization of surfaces on the nanoscale by topography-mediated selection of quasi-cylindrical and plasmonic waves Open
Using coupled electromagnetic and hydrodynamic calculations, we elucidate theoretically the topographic transition from a random metallic surface to a periodic sub-wavelength grating by ultrashort laser ablation. The origin of this transit…
View article: High-resolution material structuring using ultrafast laser non-diffractive beams
High-resolution material structuring using ultrafast laser non-diffractive beams Open
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View article: Additive and Substractive Surface Structuring by Femtosecond Laser Induced Material Ejection and Redistribution
Additive and Substractive Surface Structuring by Femtosecond Laser Induced Material Ejection and Redistribution Open
A novel additive surface structuring process is devised, which involves localized, intense femtosecond laser irradiation. The irradiation induces a phase explosion of the material being irradiated, and a subsequent ejection of the ablative…
View article: Symmetry Breaking in Nanoparticles: Photogenerated Free Carrier‐Induced Symmetry Breaking in Spherical Silicon Nanoparticle (Advanced Optical Materials 7/2018)
Symmetry Breaking in Nanoparticles: Photogenerated Free Carrier‐Induced Symmetry Breaking in Spherical Silicon Nanoparticle (Advanced Optical Materials 7/2018) Open
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View article: Well-controlled femtosecond laser inscription of periodic void structures in porous glass for photonic applications
Well-controlled femtosecond laser inscription of periodic void structures in porous glass for photonic applications Open
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View article: Numerical study of ultrashort laser-induced periodic nanostructure formation in dielectric materials
Numerical study of ultrashort laser-induced periodic nanostructure formation in dielectric materials Open
Cette these se concentre sur l'etude numerique de l'interaction laser ultrabref avec les dielectriques transparents. En particulier, le phenomene d'auto-organisation des nanoreseaux dans la silice est discute et un modele multiphysique est…
View article: Embedded nanogratings in bulk fused silica under non-diffractive Bessel ultrafast laser irradiation
Embedded nanogratings in bulk fused silica under non-diffractive Bessel ultrafast laser irradiation Open
We report the formation of embedded nanogratings in bulk fused silica under quasi-stationary field patterns generated by ultrashort laser pulses in nondiffractive modes. The zero-order Bessel beam consists of almost non-propagative light p…
View article: Modeling 2D and 3D periodic nanostructuring of materials with ultrafast laser pulses
Modeling 2D and 3D periodic nanostructuring of materials with ultrafast laser pulses Open
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