Laser recrystallization of the silicon surface layer after the operation of ion implantation An installation for effective recrystallization of the damaged surface layer of a silicon wafer after ion implantation for a semiconductor industry has been developed. The installation realizes the technology of laser annealing of a surface layer 1 μm thick of silicon wafers with a diameter up to 200 mm. This is used during manufacturing process of high-current IGBT transistors.
Femtosecond fiber lasers for various aspects of quantum technologies In addition to using a femtosecond laser in medicine and industry, there also a lot of scientific fields that can be explored with ultrafast-light technologies. In this small review some aspects of quantum technologies studied with femtosecond lasers are discussed.
Sew scenarios: a new wave The traditional physical model describing the propagation of surface electromagnetic waves (SEW) is based on the concept of a "sharp boundary" separating two homogeneous media; However the boundary between the air and the gradient dielectric without free carriers is shown to support the propagation of a new type of SEW. Spectrum of this new SEW and the spatial distribution of its electric field in the depth of transition layer of gradient dielectric are considered.
Laser nondestructive technologies for verification of organs and tissues in low-invasive and robot-assisted surgery The need to develop methods for organs and tissues differentiation in surgery is discussed. A multifactor analysis of fluorescence and backscattering spectra was carried out for different tissues. Eight out of eleven types of tissues were verified with the accuracy of the order of 80%. The obtained results allow us to assume that optical technologies could form the basis for the method of navigation in robot-assisted and low-invasive surgery in the future.
Lasys-2018: laser technologies for processing of materials The LASYS exhibition is primarily aimed at German companies, but a panorama of a various laser applications opens up to foreign developers.
Domestic crystals manufacturing for devices used in photonics (part 2 – semicoductor ionizing radiation detectors) Continuation of the review about the current state of development and production of single crystals for nuclear medicine devices in Russia is presented in the article.
Multilayer nanostructures based on porous silicon for optoelectronics Experimental evaluation of the ability to use structures based on porous silicon for solar cells and LEDs is performed. Spectral characteristics of photosensitivity of the structures with an upper layer of porous silicon and porous silicon carbide (nSiC / p-porSi heterostructures) are studied, as well as photoluminescence spectra of structures with porous silicon doped with erbium (porSi: Er structures).
Determination of the influence of laser cladding modes and composition of powder material on coating wear resistance Laser cladding of metal-ceramic powders on large-sized products gives their surfaces new antifriction properties. The limiting values of the laser energy density are determined at which the alloying elements burn out and the wear resistance begins to decrease. A technique of estimating the wear resistance coefficient is developed based on sclerometric method.