A5017402494- Nonlinear Optical Materials Studies
- Laser-Matter Interactions and Applications
- Laser-Ablation Synthesis of Nanoparticles
- Laser-Plasma Interactions and Diagnostics
- Nonlinear Optical Materials Research
- Porphyrin and Phthalocyanine Chemistry
- Gold and Silver Nanoparticles Synthesis and Applications
- Carbon and Quantum Dots Applications
- Orbital Angular Momentum in Optics
- Advanced X-ray Imaging Techniques
- Atomic and Molecular Physics
- Organic and Molecular Conductors Research
- Advanced Fiber Laser Technologies
- Electron and X-Ray Spectroscopy Techniques
- nanoparticles nucleation surface interactions
- Laser Material Processing Techniques
- Magnetism in coordination complexes
- X-ray Spectroscopy and Fluorescence Analysis
- Phase-change materials and chalcogenides
- Nanocluster Synthesis and Applications
- Luminescence and Fluorescent Materials
- Photochemistry and Electron Transfer Studies
- Advanced Optical Imaging Technologies
- Quantum Dots Synthesis And Properties
- Physical Unclonable Functions (PUFs) and Hardware Security
Laboratoire Charles Fabry
2022-2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2018-2021
Centre National de la Recherche Scientifique
2018-2021
Centre Lasers Intenses et Applications
2017-2021
Université Paris-Saclay
2020-2021
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2020-2021
Université Paris-Sud
2020
Laboratoire de Physique des Gaz et des Plasmas
2020
Université de Bordeaux
2018-2020
Foundation for Research and Technology Hellas
2010-2017
The surface chemistry of gold nanoparticles produced by the pulsed laser ablation in liquids method is investigated X-ray photoelectron spectroscopy (XPS). presence oxide expected on these systems using synchrotron radiation conditions close to their original state solvent but free from substrate or effects which could affect interpretation spectroscopic observations. For that purpose we performed experiment a controlled free-standing nanoparticle beam combination an atomizer and aerodynamic...
In the present work third order nonlinear optical response of a series pyrazoline derivatives has been experimentally investigated.
Nanodiamonds (NDs) and carbon-dots (CDs) suspensions exhibit significant NLO response under both ps ns laser excitation. NDs important optical limiting action nanosecond visible (532 nm) infrared (1064
In this work, the nonlinear optical response of some organophilic and hydrophilic carbon dots derived from gallate precursors is studied under 4 ns 35 ps, visible (532 nm) infrared (1064 laser excitation conditions by Z-scan technique. The prepared were found to exhibit considerable in visible, ones exhibiting stronger and, general, significantly larger than their counterparts. all cases, corresponding parameters have been determined. particular, it was that both exhibited important negative...
The synthesis of variable composition AuxAg(1–x) alloyed nanoparticles prepared by laser ablation in water is reported. nanoalloys exhibited a single characteristic surface plasmon resonance peak, whose spectral position was lying between the peaks neat Ag and Au nanoparticles, at about 400 530 nm respectively, depending directly on nanoparticles. nonlinear optical response studied details under 532 (visible) 35 ps 4 ns excitation it found to be significant greatly influenced plasmonic band...
Abstract Laser interaction with solids is routinely used for functionalizing materials' surfaces. In most cases, the generation of patterns/structures key feature to endow materials specific properties like hardening, superhydrophobicity, plasmonic color‐enhancement, or dedicated functions anti‐counterfeiting tags. A way generate random patterns, by means wrinkles on surfaces resulting from laser melting amorphous Ge‐based chalcogenide thin films, presented. These similar fingerprints, are...
Synthesis and characterization of the nonlinear optical properties a class semiconductors based on hybrid organic–inorganic two-dimensional are being reported. A new simple synthetic route for preparation stabilization lead iodide quantum dots (QD), (PbI6)4– structural units, provided variety appropriate solutions zero-dimensional (0D) suspensions (2D) semiconductors. The third-order both semiconducting systems were studied by means Z-scan technique under visible (532 nm) infrared (1064 nm),...
The chemical and geometrical structure of free-standing carbon dots (Cdots) prepared from the pyrolysis N-hydroxysuccinimide (NHS) have been characterized using X-ray photoelectron spectroscopy (XPS). An aerodynamic lens system was used to generate a sufficient particle density monodispersed Cdots for XPS studies at PLEIADES beamline SOLEIL synchrotron facility. Varying excitation energy between 315 755 eV allows probing surface toward their core, owing kinetic dependence inelastic mean free...
Herein we report a series of porphyrin and methano[60]fullerene that undergo self-assembly.
Optical beams carrying orbital angular momentum are a very active field of research for their prospective applications, especially at short wavelengths. We consider here such produced through high-harmonic generation (HHG) in rare gas and analyze the characterization high-charge vortex structure by an extreme ultraviolet Hartmann wavefront sensor. show that HHG generally composed set numerous modes. The sensitivity intensity phase beam to infrared laser aberrations is investigated using...
Abstract The sub‐picosecond response of amorphous germanium telluride thin film to a femtosecond laser excitation is investigated using frequency‐domain interferometry and ab initio molecular dynamics. time‐resolved measurement the surface dynamics reveals shrinkage with dielectric properties’ faster than 300 fs. systematic simulations in non‐equilibrium conditions allow atomic configurations be retrieved for ionic temperature from 1100 K width electron distribution 0.001 1.0 eV. Local order...
We present the Aurore platform for ultrafast sciences. This is based on a unique 20 W, 1 kHz, 26 fs Ti:sapphire laser system designed reliable operation and high intensity temporal contrast. The specific design ensures stability in terms of pulse duration, energy, beam pointing necessary extended experimental campaigns. supplies 5 different beamlines, all dedicated to field: attosecond science (Aurore 1), phase transitions solids 2 3), luminescence 4), femtochemistry 5). technical...
We investigate the coherence of plasma-based soft X-ray laser (XRL) for different conditions that can alter electron density in gain region. first measure source temporal amplified spontaneous emission (ASE) mode. develop a data analysis procedure to extract both its spectral width and pulse duration. These findings are agreement with line shape simulations seeded operation experimental results. Utilizing deduced duration one-dimensional Bloch-Maxwell code, we reproduce properties...
In the present work synthesis and physicochemical characterisation of a new class Pd-containing micellar nanohybrid systems are presented. The consist metallic Pd nanoparticles well-defined diblock copolymers, possessing carbazole β-ketoester side-chain functionalities, namely poly[2-(N-carbazolyl) ethyl methacrylate]-block-poly[2-(acetoacetoxy) methacrylate] (CbzEMAx-b-AEMAy). Block copolymer has been carried out by Reversible Addition–Fragmentation chain Transfer (RAFT) polymerisation....
The development of efficient multilayer mirrors for the water window (a spectral region between absorption edges carbon and oxygen, from 284 to 543 eV) remains a challenge. As best candidate, Cr/Sc provides maximum theoretical reflectivity about 60% at near-normal incidence around Sc L 2,3 edge (397 eV). However, measured peak reflectance published so far just slightly exceeds 20%. We report on new (to our knowledge) approach design more Cr/Sc-based coatings using process nitridation...
The nonlinear optical response of some carbon-based nanomaterials, namely nanodiamonds and carbon nanoparticles (C-dots) are investigated using infrared nanosecond laser pulses. Both nanocarbons had similar sizes (<; 10 nm) exhibited measurable absorption refraction. Their limiting behaviour has been also investigated. Nanodiamonds were found to exhibit remarkable in the infrared, being therefore promising candidates for potential opto-electronic photonic applications.
In the present work nonlinear optical response of some Au <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> Ag xmlns:xlink="http://www.w3.org/1999/xlink">(1-x)</sub> alloy nanoparticles (NPs) prepared by a femtosecond laser ablation process is studied using Z-scan technique employing 4 ns, 532 nm pulses. The NPs with diameters 15 - 20 nm, had different compositions, i.e. gold molar fractions (GMF) x, ranging from x = 0 (pure Ag) to 1 Au)...
“Pop-art” like patterns resulting from the interaction of a single laser pulse focused on a-Ge based chalcogenide thin film capped with SiN layer are presented by Jérôme Gaudin and co-workers. These nondeterministic surface patterns, described in article number 2003032, wrinkles height less than 100 nm sub-micrometer periodicity, which depends impinging fluence. Application as physical unclonable functions is demonstrated using fast recognition algorithm.