Vol 18, No 5 (2024)

The history of the change in the development strategy of the company SEKIRUS and its transformation into an industrial integrator of laser innovations is described. The main advantage of laser technologies is the high technological reproducibility of industrial processes, which achieves successful commercialization when introduced into laser machines. However, control systems are needed to fine tune them. The tactics of achieving industrial leadership through an emphasis on the development of control electronics, video monitoring systems, and decision-making algorithms are described. The company pays special attention to the development of controllers for various types of operations performed using laser machines.

The article presents the study results of the breakdown of fractals of the nano-sized aluminum droplets on the polymer filaments made of carbon benzene rings under a sudden voltage (discharge) of 1.6 kV cm⁻¹ that is similar in magnitude to the electric field of 2.16 kV cm⁻¹ required for the occurrence of micro-breakdown with the runaway electrons during the high-altitude lightning discharges. For the ordinary air breakdown, a voltage of 1–30 kV per centimeter is required. The photographs of radiation shapes in the optical spectral region for two types of breakdowns are provided. The possible reverse of the Doppler effect and Cherenko radiation on the fractal metamaterials is discussed.

The review discusses various ways to create single-photon sources (SPS). The task of generating single photons can be solved in various ways, and at the moment there is no one among them that would be significantly preferable. An extensive list of literature makes it possible to analyze the prospects for the development of single-photon sources.

Photonics and DNA nanotechnologies complement each other well in a way that DNA nanostructures can be used to build intricate nano-optical systems. The DNA origami method has been particularly successful in creating the building blocks for photonics. Precise positioning of elements at the nanoscale is crucial for manipulating light fields, and this can be achieved by attaching specific nano-objects to a folded DNA molecule in a controlled manner. This review will highlight successful examples of how DNA origami and photonics can collaborate effectively.

Direct laser deposition is widely used in high-tech industries due to the possibility of creating complex parts, which manufacturing is impossible using traditional production methods. However, the production process is complicating by the formation of residual stresses and deformations in the part, which negatively affect its quality. The field of distribution of stresses and deformations in the part is associated with its geometry. This article presents the main compensation methods of part distortion and describes the types of typical part deformations for DLD. The deformation compensation results are presented on example of four different parts made of stainless steel grade 12Ch18Ni10Ti (analogue AISI 304) and heat-resistant alloy VZh159.