Laser damage phenomena in fused silica are currently under study because of numerous related high power laser applications. Nanosized defects are believed to be responsible for some laser damage initiation. In order to predict and to quantify this initiation process, engineered submicronic gold defects were embedded in silica. The study of these samples by localized pulsed irradiation of isolat...

12 Background 13 Lithium di-silicate dental ceramics bonding, realized by using different resins, is strictly dependent 14 on micro-mechanical retention and chemical adhesion. The aim of this in vitro study was to 15 investigate the capability of a 1070 nm fiber laser for their surface treatment. 16 Methods 17 Samples were irradiated by a pulsed fiber laser at 1070 nm with different parameters ...

We describe a promising approach to the processing of micro-optical components, where CO(2) laser irradiation in raster scan is used to generate localized surface melting of binary or multilevel structures on silica, fabricated by conventional reactive-ion etching. The technique is shown to provide well-controlled local smoothing of step features by viscous flow under surface tension forces, re...

The objective of the work reported is to study the effect of wavelength and the material removal mechanisms of a laser process for removing copper oxide from copper. The removal of copper oxide is necessary in electronics device fabrication in order to improve the surface wetability and so achieve a good quality solder joint. Such a laser cleaning process could be incorporated into an existing ...

introduction: bleaching process can affect surface roughness of enamel, which is a vital factor in esthetic and resistance of tooth. the aim of this study was to compare surface roughness of enamel in teeth bleached using diode and neodymium-doped yttrium aluminium garnet (nd: yag) lasers with those bleached using conventional method. methods: in this study, 75 anterior human teeth from upper a...

This paper presents a numerical study of laser induced melting and solidification of crystalline Silicon (Si) using an implicit enthalpy method. The simulations are performed using the open source C++ solver known as OpenFOAM [1]. The model considers temperature dependent thermo-physical and optical properties for Si. To verify the numerical model, its predictions are compared with the experime...

abstract introduction: scaling and root planing is one of the most commonly used procedures during periodontal treatments. removal of calculus using conventional hand instruments is incomplete and rather time consuming. to find more efficient and less difficult instrumentation method, investigators have proposed lasers as an alternative or adjunct to hand instruments for scaling and root planin...

Intertwined electrode pairs, manufactured by selective laser melting, provide high surface-to-volume ratios and a constant interelectrode distance, which results in homogeneous electric field. Gyroid convective channels are integrated into the structure to further enhance transport. Further details can be found article number 2200986 John Linkhorst co-workers.

Introduction. The Collaborative Research Centre 747 “Micro cold forming” studies aspects of the production of micro components. Motivated by the engineering application of melting the end of thin wires by laser heating in order to accumulate material for a subsequent forming process, we study the melting and solidification of material with a free capillary melt surface. The model leads to a cou...