A5080941235- Nanowire Synthesis and Applications
- Silicon Nanostructures and Photoluminescence
- Fluid Dynamics and Thin Films
- Semiconductor materials and devices
- Photonic and Optical Devices
- Thin-Film Transistor Technologies
- Photonic Crystals and Applications
- Optical Coatings and Gratings
- Semiconductor materials and interfaces
- Semiconductor Quantum Structures and Devices
- Nanofabrication and Lithography Techniques
- Solidification and crystal growth phenomena
- Quantum Dots Synthesis And Properties
- Pickering emulsions and particle stabilization
- Integrated Circuits and Semiconductor Failure Analysis
- Microfluidic and Bio-sensing Technologies
- Fluid Dynamics and Turbulent Flows
- solar cell performance optimization
- Anodic Oxide Films and Nanostructures
- Ion-surface interactions and analysis
- Near-Field Optical Microscopy
- Fluid Dynamics and Heat Transfer
- Advancements in Semiconductor Devices and Circuit Design
- ZnO doping and properties
- Ga2O3 and related materials
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
2018-2024
Centrale Marseille
2018-2024
Centre National de la Recherche Scientifique
2018-2024
University of Hassan II Casablanca
2016-2024
Aix-Marseille Université
2018-2024
University of Sousse
2024
University of Monastir
2024
Université de Toulon
2018-2024
Solvay (Belgium)
2024
Université Hassan II Mohammedia
2013
In this study, we report the growth and characterization of high-quality SiGe/SiO2 core–shell nanocrystals on an insulator. Our approach involves solid-state dewetting a germanium (Ge) film deposited via molecular beam epitaxy ultrathin silicon-on-insulator film. The resulting exhibit exceptional uniformity, well-defined hemispherical shape, distinct crystallographic facets, as confirmed by rigorous analyses using advanced techniques, such high-resolution transmission electron microscopy...
We report on the dewetting process, in a high vacuum environment, of amorphous Ge thin films SiO2/Si (001). A detailed insight is obtained by situ reflection high-energy electron diffraction and ex scanning microscopy. These characterizations show that dewet into crystalline nano-islands with dynamics dominated crystallization material nano-seeds transport at islands. Surface energy minimization determines process controls final stages process. At very temperatures, coarsening island size...
Natural porous systems, such as soil, membranes, and biological tissues comprise disordered structures characterized by dead-end pores connected to a network of percolating channels. The release dispersion particles, solutes, microorganisms from features is key for broad range environmental medical applications including soil remediation, filtration drug delivery. Yet, owing the stagnant opaque nature these role microscopic structure flow on particles solutes remains poorly understood. Here,...
In this work, we propose a novel efficient strategy based on the combination of molecular beam epitaxy deposition and solid-state dewetting process for growth self-assembly magnetic GeMn nanoparticles SiO2 substrate. Morphological structural investigations carried out by AFM HR-TEM microcopies show that these are very dense (1012 cm–2), homogeneous, have free-defect single-crystalline Ge-Mn phase. The properties superconducting quantum interference device (SQUID) reveal our ferromagnetic...
To efficiently integrate SiGe-based Mie resonators and germanium quantum dots into a single-layer structure for ultrathin solar cells high performance self-powered photodetectors, we introduce an innovative method involving solid-state dewetting (Ge) condensation within SiGe nanocrystals. This results in the growth of SiGe/SiO2-SiGe-SiO2 core/shells nanocrystals decorated with Ge dots. The process begins dewetting, initiating core (Mie resonators) from layer initially deposited via molecular...
Materials featuring anomalous suppression of density fluctuations over large length scales are emerging systems known as disordered hyperuniform. The underlying hidden order renders them appealing for several applications, such light management and topologically protected electronic states. These applications require scalable fabrication, which is hard to achieve with available top-down approaches. Theoretically, it that spinodal decomposition can lead hyperuniform architectures. Spontaneous...
Abstract Large-scale, defect-free, micro- and nano-circuits with controlled inter-connections represent the nexus between electronic photonic components. However, their fabrication over large scales often requires demanding procedures that are hardly scalable. Here we synthesize arrays of parallel ultra-long (up to 0.75 mm), monocrystalline, silicon-based nano-wires complex, connected circuits exploiting low-resolution etching annealing thin silicon films on insulator. Phase field...
We demonstrate efficient anti reflection coatings based on adiabatic index matching obtained via nano-imprint lithography. They exhibit high total transmission, achromaticity (99.5% < T 99.8% from 390 to 900 nm and 99% 99.5% 800 1600 nm) wide angular acceptance (T > up 50 degrees). Our devices show laser-induced damage thresholds in the sub-picosecond (>5 J/cm2 at 1030 nm, 500 fs), nanosecond (>150 1064 12 ns >100 532 ns) regimes, low absorption CW regime (<1.3 ppm 1080 nm), close those of...
Fabrication and scaling of disordered hyperuniform materials remain hampered by the difficulties in controlling spontaneous phenomena leading to this novel kind exotic arrangement objects. Here, we demonstrate a hybrid top-down/bottom-up approach based on sol–gel dip-coating nanoimprint lithography for faithful reproduction metasurfaces metal oxides. Nano- microstructures made silica titania can be directly printed over several cm2 glass silicon substrates. First, describe polymer mold...
Abstract Flexible and stretchable photonics are emerging fields aiming to develop novel applications where the devices need conform uneven surfaces or whenever lightness reduced thickness major requirements. However, owing relatively small refractive index of transparent soft matter including most polymers, these materials not well adapted for light management at visible near-infrared frequencies. Here we demonstrate simple, low cost efficient protocols fabricating Si 1− x Ge -based,...
We use low-resolution optical lithography joined with solid state dewetting of crystalline, ultra-thin silicon on insulator (c-UT-SOI) to form monocrystalline, atomically smooth, silicon-based Mie resonators in well-controlled large periodic arrays. The dewetted islands have a typical size the 100 nm range, about one order magnitude smaller than etching resolution. Exploiting 2 µ m thick SiO layer separating and underlying bulk wafer, we combine resonant modes antennas etalon effect. This...