Publication
Analyzing the phonon-polariton response of silicon Carbide microparticles and nanoparticles by use of the Bondary Element Method
Publications associées (32)
On the interaction of femtosecond laser pulses with layered dielectric materials
Materials properties are strictly dependent on their microstructure. The internal symmetries and the disposition of the constituting atoms of a material, which depend on its crystallographic structure, greatly affect its response to mechanical, electromagn ...
EPFL2023Third-harmonic generation monitoring of femtosecond-laser-induced in-volume functional modifications
Christian Enz, Yves Bellouard, Assim Boukhayma, Andrea Kraxner, Olivier Bernard
During the last two decades, ultrafast in-volume laser-based processing of transparent materials has emerged as a key 3D-printing method for manufacturing a variety of complex integrated photonic devices and micro-parts. Yet, identifying suitable laser pro ...
2023Laser engraving device for multiple laser beams using a data link for adjusting the focusing position
The present invention concerns a laser engraving device (1) for engraving a target surface (17). The laser engraving device (1) comprises: a beam splitter (7) for dividing a processing laser beam (25) into a plurality of engraving laser beams (27); a first ...
2022Ultrafast carbothermal reduction of silica to silicon using a CO2 laser beam
We report the extraction of silicon via a carbothermal reduction process using a CO2 laser beam as a heat source. The surface of a mixture of silica and carbon black powder became brown after laser beam irradiation for a few tens of seconds, and clear peak ...
NATURE RESEARCH2020Laser coating of a Zr-based metallic glass on an aluminum substrate
Roland Logé, Stefano Mischler, Jamasp Jhabvala, Alejandro Roda Buch, Navid Sohrabi
Cladding of a Zr-based metallic glass (MG) on an aluminum substrate was conducted using a layer-wise laser additive manufacturing (AM) method, leading to relative densities higher than 99%. The thickness of the cladding was about 300 μm. The effect of lase ...
2020Laser engraving device for multiple laser beams
The present invention concerns a laser engraving device (1) for engraving a target surface (17). The laser engraving device (1) comprises: a beam splitter (7) for dividing a processing laser beam (25) into a plurality of engraving laser beams (27); a first ...
2020Elastic properties of self-organized nanogratings produced by femtosecond laser exposure of fused silica
Yves Bellouard, Pieter Vlugter
Under certain exposure conditions, a femtosecond laser beam focused in the bulk of fused silica leads to the formation of self-organized structures consisting of a series of “nanolayers,” parallel to one another. Remarkably, this laser-induced nanoscale an ...
2020An effective rule for translating optimal selective laser melting processing parameters from one material to another
Roland Logé, Jamasp Jhabvala, Eric Boillat, Rita Drissi Daoudi, Hossein Ghasemi Tabasi, Toni Ivas
Selective Laser Melting (SLM) or Laser Powder Bed Fusion (L-PBF) is the most studied laser-based additive manufacturing process for metals and alloys. One important issue in SLM is the time-consuming identification of a process window leading to quasi full ...
2020Metallization of Si heterojunction solar cells by nanosecond laser ablation and Ni-Cu plating
Christophe Ballif, Aïcha Hessler-Wyser, Bertrand Yves Paul Paviet-Salomon, Jan-Willem Alexander Schüttauf, Matthieu Despeisse, Monica Morales Masis, Ali Dabirian
A key step in industrialization of photovoltaics (PV) is the development of low-cost and large-area metallization processes to substitute the standard screen-printing process of silver paste. Thus Cu and Ni metallization processes enabled by laser patterni ...
Elsevier2017Morphology and composition of oxidized InAs nanowires studied by combined Raman spectroscopy and transmission electron microscopy
Anna Fontcuberta i Morral, Esther Alarcon Llado, Francesca Amaduzzi
importance for semiconductor nanowires because of the high surface-to-volume ratio and only little is known about the consequences of oxidation for these systems. Here, we study the properties of indium arsenide nanowires which were locally oxidized using ...
Institute of Physics2016