Results 131 to 140 of about 1,271,779 (368)

Rapid characterisation of Photonic Crystal Fibre dispersive properties by a stochastic and tunable picosecond pump source [PDF]

EPJ Web of Conferences, 2022
Walter Guillaume, Ahmedou Sidi-Ely, De Thoury Thelma, Dos Santos Nicolas, Herbuvaux Jules, Redon Melvin, Delagnes Jean-Christophe, Dauliat Romain, Février Sébastien, Valentin Constance, Petit Stéphane, Valero Nicolas, Marion Denis, Lhermite Jérôme, Tanzilli Sébastien, Gérôme Frédéric, Debord Benoît, Benabid Fetah, Millot Guy, Roy Philippe, Jamier Raphael   +20 more
doaj   +1 more source

Tungsten Molecular Species in Deuterium Plasmas in Contact with Sputtered W Surfaces

Molecules
We show that in plasmas generated in deuterium in the presence of sputtered W surfaces, various molecular tungsten species are formed, whose chemical composition depends on the presence of gaseous impurities, namely, nitrogen, oxygen, and hydrogen.
Gheorghe Dinescu, Cristina Craciun, Silviu Daniel Stoica, Catalin Constantin, Bogdana Maria Mitu, Tomy Acsente   +5 more
doaj   +1 more source

Prediction of Surface Topography Parameters in Direct Laser Interference Patterning of Stainless Steel Using Infrared Monitoring and Convolutional Neural Networks

Advanced Engineering Materials, EarlyView.
This study presents an infrared monitoring approach for direct laser interference patterning (DLIP) combined with a convolutional neural network (CNN). Thermal emission data captured during structuring are used to predict surface topography parameters.
Lukas Olawsky, Marcelo Sallese, Leander Kläber, Clemens Kuhn, Keming Du, Andrés Fabián Lasagni   +5 more
wiley   +1 more source

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti, Finn‐Lennard Janthur, Selina Raumel, Sascha Jan Zimmermann, Sarah Seffer, René Gustus, Sebastian Herbst, Marc C. Wurz, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Florian Nürnberger   +11 more
wiley   +1 more source

Antitumoral-Embedded Biopolymeric Spheres for Implantable Devices

Pharmaceutics
The bioactive surface modification of implantable devices paves the way towards the personalized healthcare practice by providing a versatile and tunable approach that increase the patient outcome, facilitate the medical procedure, and reduce the ...
Valentina Grumezescu, Oana Gherasim, Bianca Gălățeanu, Ariana Hudiță   +3 more
doaj   +1 more source

Polarization dynamics in vertical-cavity surface emitting lasers

, 2005
Experiments and their interpretation on polarization dynamics and polarization switching in vertical-cavity surface-emitting lasers operated in the fundamental transverse mode regime are reviewed.
Sondermann, M., Ackemann, Thorsten
core  

External cavity mode structure of a two-mode VCSEL subject to optical feedback

, 2007
We consider a multi-transverse-mode vertical-cavity surface-emitting laser (VCSEL) subject to optical feedback. The system is modeled by a partial differential equation for the spatial carrier population, which is coupled to delay differential equations ...
Green, K, Krauskopf, B., Lenstra, D., Green, K., Lenstra, D, Krauskopf, B   +5 more
core   +1 more source

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source

Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres

Advanced Engineering Materials, EarlyView.
This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann, René Gustus, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +3 more
wiley   +1 more source

Enantio-selective vibronic coupling revealed via dissymmetry of upconverted emission in double-resonance excitation of chiral polymer

Nature Communications
Double-resonance dual-beam spectroscopy, involving vibrational and electronic transitions, is a powerful tool allowing to resolve vibronic coupling in complex molecular systems. Here, introducing resonant three-photon excitation with mid-infrared beam in
Guang S. He, Cecilia L.A.V. Campos, Jojo P. Joseph, Alexander S. Baev, Paras N. Prasad   +4 more
doaj   +1 more source