A5057203584- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Laser-Plasma Interactions and Diagnostics
- Advanced X-ray Imaging Techniques
- Advanced Electron Microscopy Techniques and Applications
- Spectroscopy and Quantum Chemical Studies
- Mass Spectrometry Techniques and Applications
- Plasmonic and Surface Plasmon Research
- Laser Design and Applications
- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Spectroscopy and Laser Applications
- Photonic Crystal and Fiber Optics
- Gyrotron and Vacuum Electronics Research
- Photonic and Optical Devices
- Laser Material Processing Techniques
- Digital Holography and Microscopy
- Terahertz technology and applications
- Advanced Chemical Physics Studies
- Solid-state spectroscopy and crystallography
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Molecular Physics
- Nonlinear Optical Materials Studies
- Orbital Angular Momentum in Optics
- Particle Accelerators and Free-Electron Lasers
CEA Paris-Saclay
2015-2025
Laboratoire Interactions, Dynamiques et Lasers
2015-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2025
Université Paris-Saclay
2011-2025
CY Cergy Paris Université
2024-2025
Centre National de la Recherche Scientifique
2017-2022
Université de Limoges
2021
Lebanese American University
2021
Lahore University of Management Sciences
2021
CEA Paris-Saclay - Etablissement de Saclay
2007-2020
In the context of x-ray lensless imaging, we present a recent approach for Fourier transform holography based on use extended references. Major advances shown here rely high signal efficiency and direct image reconstruction object performed by simple linear derivative. Moreover, holographic reference is easy to manufacture can be applied variety imaging experiments. Here demonstrate single-shot with table-top, laser-based coherent soft source. A spatial resolution 110 nm was obtained an...
Calculations are presented for the generation of an isolated attosecond pulse in a multicycle two-color strong-field regime. We show that recollision electron wave packet can be confined to half optical cycle using pulses up 40 fs duration. The scheme is proven efficient two intense beams, one producing strong field at omega and other detuned from 2omega. slight detuning deltaomega second harmonic used break symmetry electric over many cycles provides coherent control formation pulse.
Abstract The enhancement and control of non-linear phenomena at a nanometer scale has wide range applications in science industry. Among these phenomena, high-harmonic generation solids is recent focus research to realize next petahertz optoelectronic devices or compact all solid state EUV sources. Here, we report on the realization first nanoscale high harmonic source. strong field regime reached by confining electric from few nanojoules femtosecond laser single 3D semiconductor waveguide....
High-order harmonic generation (HHG) from crystals is emerging as a new ultrashort source of coherent extreme ultraviolet (XUV) light. Doping the crystal structure can offer way to control properties. Here, we present study HHG enhancement in XUV spectral region an ionic crystal, using dopant-induced vacancy defects, driven by laser centered at wavelength 1.55 μm. Our numerical simulations based on solutions semiconductor Bloch equations and density-functional theory are supported our...
We demonstrate high-harmonic generation (HHG) in solids using a high-energy fiber laser system operating at 1550 nm. The driving few-cycle source consists of an erbium-doped chirped pulse amplifier combined with post-compression stage featuring gas-filled hollow-core photonic crystal (HC-PCF). nonlinear self-compression process the HC-PCF enables ultrashort pulses sub-50 fs durations and μJ-level energies 660 kHz repetition rate. Perturbative non-perturbative harmonics were subsequently...
Abstract Owing to their high mobility and immunity topological deflection, skyrmions in antiferromagnetic (AFM) systems are gaining attention as a potential solution for next‐generation magnetic data storage. Synthetic antiferromagnets (SAFs) offer promising avenue tune the properties of individual layers, facilitating conditions necessary be used practical devices. Despite recent advancements achieving fast skyrmion mobility, nucleation small rigid circular without an external field remains...
We present experimental and numerical results on high-order-harmonic generation with a flat-top laser beam. show that simple binary tunable phase plate, made of two concentric glass plates, can produce profile at the focus Gaussian infrared Both experiments calculations there is scaling law between harmonic efficiency increase volume.
Plasmonic dimer nanoantennas can significantly boost the electric field strength in gap region, allowing for a modification of feed geometry by femtosecond laser illumination.Using resonant bowtie antennas to enhance low-fluence oscillator, here we experimentally demonstrate highly localized reshaping antennas, resulting self-optimization antenna shape.From high-resolution scanning electron micrographs and two-dimensional energy dispersive x-ray maps, analyze near-field enhanced...
Today, 3D imaging techniques are emerging, not only as a new tool in early drug discovery but also for the development of potential therapeutics to treat disease. Particular efforts directed towards vivo physiology avoid perturbing system under study. Here, we assess non-invasive lensless and its impact on cell behavior analysis. We test our concept various bio-applications present here first results. The microscopy platform based in-holography provides large fields view images (several mm2...
We present measurements of the different quantum path contributions to high-order harmonic emission. Through spatial and spectral filtering, we evidence strong correlation between distributions, which allows us quantify contribution each path. A systematic analysis as a function generating parameters has been done identify conditions for efficient generation selection single show that combining phase matching filtering maximizing selecting short contribution, condition ``clean'' intense...
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not.The documents may come from teaching institutions in France abroad, public private centers.L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de scientifiques niveau recherche, publiés ou non, émanant des établissements d'enseignement recherche français étrangers, laboratoires publics privés.
We present single shot nanoscale imaging using a table-top femtosecond soft X-ray laser harmonic source at wavelength of 32 nm. show that the phase retrieval process in coherent diffractive critically depends on beam quality. Coherence and image fidelity are measured from single-shot diffraction patterns isolated nano-patterned slits. Impact flux, wave front coherence quality discussed. After improvements, final reconstruction is presented with spatial resolution 78 nm (half period) 20 fs shot.
Light beams carrying orbital angular momentum (OAM) have led to stunning applications in various fields from quantum information microscopy. We examine OAM the recently observed high-harmonic generation (HHG) semiconductor crystals. HHG solids could be a valuable approach for integrated high-flux short-wavelength coherent light sources. First, we verify transfer and conservation of strong-field regime interaction laser harmonics. Secondly, create by etching spiral zone structure directly at...
published or not.The documents may come from teaching and research institutions in France abroad, public private centers.L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de scientifiques niveau recherche, publiés ou non, émanant des établissements d'enseignement recherche français étrangers, laboratoires publics privés.
We demonstrate a method of using Fourier holographic technique to utilize attosecond soft x-ray pulses image nanometer-scale objects. A discrete frequency comb laser-generated high-order harmonics, yielding train pulses, has been used record spatially and spectrally resolved images. The individual wavelengths were also combined form single image, albeit with lower spatial resolution, demonstrating the applicability isolated continuous bandwidths.
We present measurements of photon absorption by free electrons as a solid is transformed to plasma. A femtosecond x-ray free-electron laser used heat solid, which separates the electron and ion heating time scales. The changes in are measured with an independent probe pulse created through high-order-harmonic generation. find increase temperature have relatively small impact on absorption, contrary several predictions, whereas increases absorption. compare data current theoretical numerical...
We report on the carrier-envelope phase (CEP) stabilization of a Yb-doped fiber amplifier system delivering 30 μJ pulses at 100 kHz repetition rate. A single-shot, every-shot measurement CEP stability based simple f-2f interferometer is performed, yielding standard deviation 320 mrad rms over 1 s. Long-term also assessed, with 380 measured h. This level performance allowed by hybrid architecture, including passively CEP-stabilized front-end difference frequency generation and an active loop...