A5070137829- Laser-Plasma Interactions and Diagnostics
- High-pressure geophysics and materials
- Laser-induced spectroscopy and plasma
- Thin-Film Transistor Technologies
- Laser-Matter Interactions and Applications
- Silicon Nanostructures and Photoluminescence
- Laser Material Processing Techniques
- Silicon and Solar Cell Technologies
- Advanced Numerical Analysis Techniques
- Architecture and Art History Studies
- Power Systems Fault Detection
- Magneto-Optical Properties and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Manufacturing Process and Optimization
- Architecture, Art, Education
- Advanced Surface Polishing Techniques
- Acoustic Wave Resonator Technologies
- BIM and Construction Integration
- Advanced Frequency and Time Standards
Aix-Marseille Université
2021
Centre National de la Recherche Scientifique
2021
Universidad Politécnica de Madrid
2003-2018
ABSTRACT In this work we study the optimization of laser‐fired contact (LFC) processing parameters, namely laser power and number pulses, based on electrical resistance measurement an aluminum single LFC point. process has been made through four passivation layers that are typically used in c‐Si mc‐Si solar cell fabrication: thermally grown silicon oxide (SiO 2 ), deposited phosphorus‐doped amorphous carbide (a‐SiC x /H( n )), (Al O 3 ) nitride (SiN /H) films. Values for normalized by spot...
Hyperdoped and textured silicon created with a femtosecond laser in the presence of SF 6 gas has highly absorbing surface extended spectral sensitivity infrared. The main drawback this micro‐ nanostructured material for photovoltaic (PV) cells is an increase charge‐carrier recombination at due to typically poor crystallinity layer. Laser annealing postprocessing black (b‐Si) used greatly reduce crystal structure defects while maintaining sub‐bandgap absorption. back side cell functionalized...
CR-39 nuclear track material is frequently used for the detection of protons accelerated in laser-plasma interactions. The measurement densities allows determination particle angular distributions, and information on kinetic energy can be obtained by use passive absorbers. We present a precise method measuring spectral distributions laser-accelerated single etching analysis process. make one-to-one relation between proton size calibration based monoenergetic beams. While this limited to...
We report on benchmark tests of a 3 TW/50 fs, table-top laser system specifically developed for proton acceleration with an intrinsic pump rate up to 100 Hz. In two series single-shot measurements differing in pulse energy and contrast the successful operation diode pumped is demonstrated. Protons have been accelerated 1.6 MeV interactions pulses focused aluminium mylar foils between 0.8 25 μm thickness. Their spectral distributions maximum energies are consistent former experiments under...
Local laser doping (LLD) and fired-contacts (LFC) are among the most promising techniques based on tools to be industrially applied in high efficiency crystalline silicon (c-Si) solar cells production. Here we present a comprehensive parameterization of LLD LFC processes using commercial ns sources. The best process conditions assessed both analysing morphology electrical characteristics irradiated test samples. Values for normalized resistance far below 1.0 mΩcm2 have been obtained. For...
Abstract Laser-plasma interactions at high intensities are often accompanied by emission of a strong electromagnetic pulse (EMP) interfering with particle detectors or other electronic equipment. We present experimental evidence for significant differences in noise amplitudes laser-proton acceleration from aluminium as compared to mylar target foils. Such dissimilarities have been consistently observed throughout two series measurements indicating that, under otherwise identical conditions,...
We report on the recent demonstration of proton acceleration from a purpose-made Ti:Sapphire laser system. In first successful series autumn 2015, running at 2 TW peak power and 100 Hz diode pump rate, protons up to 0.7 MeV have been spectrally characterised. Subsequently, increased pulse energy improved contrast, we obtained maximum particle energies around 1.7 MeV. These results, achieved in single-shot mode with variety thin foil targets, are an important step towards our aim stable,...
An alternative method to generate chirp signals in SFCW-radars based on sigma-delta fractional synthesizers which allow get high resolutions a great bandwidth and with linearity, necessary qualities for the systems SFCW.
Large-scale fabrication of targets for laser-driven acceleration ion beams is a prerequisite to establish suitable applications, and keep up with the challenge increasing repetition rate currently available high-power lasers. Here we present manufacturing test results large arrays solid TNSA acceleration. By applying micro-electro-mechanical-system (MEMS) based methods allowing parallel processing thousands on single Si wafer, sub-micrometric, thin-layer metallic membranes were fabricated by...
Table-top lasers of moderate energies (0.1- 0.5 J) are promising, cost-effective laser-driven sources MeV-energy protons and ions accelerators, but many applications laser-accelerated ion beams will not only require a low cost, compact system also operation at high repetition rates (>10 Hz).