A5012012028- Metal and Thin Film Mechanics
- Electron and X-Ray Spectroscopy Techniques
- Surface Roughness and Optical Measurements
- Advancements in Photolithography Techniques
- Optical Coatings and Gratings
- Graphene research and applications
- Integrated Circuits and Semiconductor Failure Analysis
- Diamond and Carbon-based Materials Research
- Quantum Dots Synthesis And Properties
- Carbon Nanotubes in Composites
- Semiconductor materials and devices
- Thin-Film Transistor Technologies
- Silicon Nanostructures and Photoluminescence
- Nanowire Synthesis and Applications
- X-ray Diffraction in Crystallography
- Laser Material Processing Techniques
- Crystallization and Solubility Studies
- Copper Interconnects and Reliability
- Organic Light-Emitting Diodes Research
- Plasmonic and Surface Plasmon Research
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Measurement and Metrology Techniques
- Semiconductor materials and interfaces
- Ion-surface interactions and analysis
- Advanced Sensor Technologies Research
Université Grenoble Alpes
2010-2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2010-2021
CEA Grenoble
2005-2021
CEA LETI
2002-2021
Institut polytechnique de Grenoble
1994-2021
CEA LITEN
2008-2015
CEA Cadarache
2014
Trinity College Dublin
2014
University of Cambridge
2014
Centre National de la Recherche Scientifique
2013
We present the science and technology roadmap for graphene, related two-dimensional crystals, hybrid systems, targeting an evolution in technology, that might lead to impacts benefits reaching into most areas of society. This was developed within framework European Graphene Flagship outlines main targets research as best understood at start this ambitious project. provide overview key aspects graphene materials (GRMs), ranging from fundamental challenges a variety applications large number...
While the development of chiral molecules displaying circularly polarized luminescence (CPL) has received considerable attention, corresponding CPL intensity, g lum, hardly exceeds 10-2 at molecular level owing to difficulty in optimizing key parameters governing such a process. To address this challenge, we report here synthesis and chiroptical properties new family π-helical push-pull systems based on carbo[6]helicene, where latter acts as either electron acceptor or donor unit. This...
Abstract Molecular designs merging circularly polarized luminescence (CPL) and thermally activated delayed fluorescence (CP‐TADF) using the concept of chiral perturbation appeared recently as a cornerstone for development efficient CP‐organic light emitting diodes (CP‐OLED). Such devices could strongly increase energy efficiency performances conventional OLED displays, in which 50% emitted is often lost due to use antiglare filters. In this context, herein, ten couples enantiomers derived...
Here we report on technology developments implemented into the Graphene Flagship European project for integration of graphene and graphene-related materials (GRMs) energy application devices. Many technologies investigated so far aim at producing composite associating or GRMs with either metal semiconducting nanocrystals other carbon nanostructures (e.g., CNT, graphite). These composites can be used favourably as hydrogen storage solar cell absorbers. They also provide better performing...
Single layers of MgF2 and LaF3 were deposited upon superpolished fused-silica CaF2 substrates by ion-beam sputtering (IBS) as well boat electron beam (e-beam) evaporation characterized a variety complementary analytical techniques. Besides undergoing photometric ellipsometric inspection, the samples investigated at 193 633 nm an optical scatter measurement facility. The structural properties assessed with atomic-force microscopy, x-ray diffraction, TEM techniques that involved conventional...
Copper nanoparticles (NPs) were synthesized by inert-gas condensation of a sputtered metallic vapor using dedicated commercial reactor. By controlling the time residence NPs in carrier gas phase via tuning collision path length, Cu produced. They exhibit various and well controlled diameters (3–10 nm) relatively narrow size dispersion. On basis these experimental results, detailed modeling NP nucleation growth based on classical theory was developed. It takes into account peculiar geometry...
An integration scheme for carbon nanotube via interconnects is described to produce densities of 2.5 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12</sup> tubes/cm xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> or 8 walls/cm on metallic Al-Cu lines, an order magnitude beyond the previous state art, and, first time, close that needed implementation.
A method for characterizing the microroughness of samples in optical coating technology is developed. Measurements over different spatial-frequency ranges are composed into a single power spectral density (PSD) covering large bandwidth. This followed by extraction characteristic parameters through fitting PSD to suitable combination theoretical models. The allows us combine measurements performed with techniques, and procedure can be adapted any behavior combined PSD. has been applied set...
Abstract This paper focuses on the dimensioning of a very bright full color 10 μm‐pitch light‐emitting device (LED) microdisplay for avionics application. Starting from specifications head‐mounted display to be used in an augmented reality optical system, theoretical approach is proposed that enables predicting main technology building blocks entering into manufacturing process flow. By taking account various material and technological parameters, kept as realistic possible, it possible...
Silver thin films have been deposited on various substrates at floating potentials by radio frequency magnetron sputtering of a silver target in pure argon plasma using load-locked equipment. Under the experimental conditions investigated, deposition rate was about 70 nm/min so that metal as 200 nm could be within easily controllable durations. Film surfaces and cross sections were examined scanning electron microscopy. The morphology fully dense. crystallographic structure investigated...
The LED technology is seen today as the most promising approach to manufacture high luminance color microdisplays for augmented reality application. So far, it mostly involves blue micro-LED and quantum dots-based layers green red generation by light down-conversion. Despite significant progress, viability of this still raises many questions. Among them, stability conversion layer under nominal display operating conditions an issue which has not been thoroughly addressed yet. This paper...
The determination of optical parameters thin films from experimental data is a typical task in the field optical-coating technology. characterization single layer deposited on substrate with known widely used for this purpose. Results are dependent not only choice thin-film model but also quality data. theoretical results presented highlight effect systematic errors measurement parameters. Application these illustrated by analysis magnesium fluoride films.
The optical, mechanical, and microstructural properties of MgF2 single layers grown by ion beam sputtering have been investigated spectrophotometric measurements, film stress characterization, x-ray photoelectron spectroscopy (XPS), diffraction, transmission electron microscopy. deposition conditions, using fluorine reactive gas or not, found to greatly influence the optical absorption films as well their microstructure. with compensation exhibit a regular columnar microstructure an...
Magnesium fluoride films have been deposited on quartz and silicon substrates by direct electron beam evaporation. The structure, composition, mass density of were investigated as functions the deposition temperature ranging from ambient to 300 °C. composition determined infrared spectroscopy, residual stresses in calculated change radius curvature Si substrates, studied aging time room air temperature. behavior is analyzed discussed connection with microstructure films.
In the field of augmented reality, there is a need for very bright color microdisplays to meet user specifications. Today, one most promising technology manufacture such displays involves blue micro-LED and quantum dots-based conversion layers. Despite recent progress, external power efficiencies (EPCE) these layers remain under ∼25%, below needs (>40%) reach white luminance 100,000 cd/m 2 . this work, we have synthesized CdSe x S 1-x nanoplatelet-based red green conversion, measured...
Magnesium fluoride thin films were deposited on silica glass and single crystal silicon substrates by argon ion-beam assisted deposition (IBAD). The effects of ions impinging the growing film optical chemical properties layers investigated. Compared to MgF2 produced direct electron-beam evaporation, obtained IBAD exhibited increased absorption refractive indices, fluorine depletion oxygen contamination. Optical data analyzed are discussed with regard composition films.
Germanium nanocrystals were prepared by a nanocluster source and characterized photoluminescence spectroscopic photometry methods. The optical measurements carried out in order to estimate the effective bandgap of Ge nanocrystals. Both Mie theory quantum confinement applied interpret extracted absorption data. We found that enables explain nanocrystal size host matrix dependence bandgap. On other hand, have not allowed confirm evaluated from This is explained as due dominant effect...