Development of Plasma Processing Systems for Optics and Electronics Products DOI: 10.22184/1993-7296.FRos.2022.16.2.136.140
Plasma treatment is actively used in the manufacture of optical components for photonics and microelectronics products: cleaning the surface from contamination, reducing surface roughness, increasing surface energy and surface modification. The article provides information about the line of MPC plasma processing units developed by GN tech in collaboration with specialists from Moscow State Technical University named after. N. E. Bauman. Emphasis is placed on an innovative development – a setup with a high-current bipolar low-frequency pulse generator, which provides an increased concentration of low-energy ions and a significantly lower process temperature for processing advanced photonics and microelectronics products (polymer lenses, waveguides) that are sensitive to plasma.
Ultra-High Temperature Carbides Under Irradiation of the Power Industrial Lasers DOI: 10.22184/1993-7296.FRos.2022.16.2.142.154
The paper presents an experimental study of the behavior of high-density zirconium carbide in oxidizing atmosphere (in air flow). The study has been conducted with a specially developed experimental setup with a high-power technological laser providing heating of zirconium carbide in a wide range of heating rates, which make it possible to study the formation of an oxide layer at different regimes. High-speed video recording of the heated surface in the conditions of external illumination in combination with the multichannel pyrometry enabled to analyze the main features of the formation of the oxide layer at the surface of zirconium carbide. A detailed study of the zone of laser radiation exposure in an oxidizing atmosphere was performed using electron microscopy, X-ray diffraction and Raman spectroscopy.
Determination of Parameters of Laser Impact Zones and Tribotechnical Properties of Steel Surfaces DOI: 10.22184/1993-7296.FRos.2022.16.2.156.166
The article presents the results of metallographic and tribotechnical studies of 40Kh steel samples with laser hardening from liquid and solid states. On the basis of the regression analysis carried out, regularities were obtained for changing the depth and width of the heat-affected zones with varying frequencies of transverse oscillations of the beam, processing speed, and its defocusing. The possibilities of using scanning devices of the resonant type for laser heat treatment and alloying of steels have been expanded. An analysis of the results of tribotechnical tests showed a significant decrease in friction coefficients, an increase in wear resistance and load capacity of the contact compared to the original steel.
Photoelectrochemical Water Splitting by a Nanostructured Electrode and Green Hydrogen Energy DOI: 10.22184/1993-7296.FRos.2022.16.2.116.125
This article describes a promising hydrogen formation method, namely the photoelectrochemical water splitting. This approach combines the direct use of solar energy and low production cost of photoelectrochemical cells using the widely used semiconductor materials. The latest advances in such cell design include nanostructuring of the semiconductor electrodes with plasmonic materials.
Photonics of Semiconductor Quantum Dots: Applied Aspects DOI: 10.22184/1993-7296.FRos.2022.16.2.96.112
Semiconductor nanocrystals (quantum dots, QDs) have unique photophysical properties, which opens up wide possibilities for their applications in the methods and tools of modern photonics. This article discusses possible applications of QDs. Both existing devices and prospects for the development of new methods and photonics devices are discussed. Innovative approaches to the use of quantum dots in various areas of modern photonic technologies are considered: optoelectronics, biophysics, quantum optics, sensorics, photovoltaics.
Rb2CuCl4 · 2H2O Crystal for Optical Applications DOI: 10.22184/1993-7296.FRos.2022.16.2.126.134
The phase equilibria in the RbCl – CuCl2 · 2H2O – H2O system were examined in the temperature range of 25–50°C. The concentration limits of crystallization, the temperature dependence, and the congruent nature of solubility of the Rb2CuCl4 · 2H2O compound were determined. The Rb2CuCl4 · 2H2O crystal was obtained by the temperature reduction method and its optical transmittance spectrum was studied for the first time.