Vladimir Osipov

Aston University · Aston Institute of Photonic Technologies

We propose a method for designing multifocal diffractive lenses generating prescribed sets of foci with fixed positions at several different wavelengths. The method is based on minimizing the difference between the complex amplitudes of the beams generated by the lens microrelief at the design wavelengths, and the functions of the complex transmiss...

The fabrication of submicron-height sine-like relief of a trifocal diffractive zone plate using a nanoimprinting technique is studied. The zone plate is intended for use in combined trifocal diffractive-refractive lenses and provides the possibility to form trifocal intraocular lenses with predetermined light intensity distribution between foci. Th...

The two-photon polymerization technique is applied for the fabrication of diffractive optical elements (DOE) with a four-level microrelief. These DOEs form longitudinal intensity distribution (axial light segment) with dimensions required for ophthalmological applications.

Application of the two-photon polymerization (2PP) technique for the fabrication of binary radial diffractive optical elements (DOEs) to form a bottle-like intensity distribution, or “light bottle,” is studied. Computer modeling and fabrication of a binary DOE for the formation of the desired light distributions are realized. The results of scannin...

Fabrication of submicron-height relief of three-focal diffractive lenses using two-photon polymerization is studied. Optical properties of the designed lenses are investigated theoretically and experimentally. The proposed design of the combined diffractive–refractive lenses is promising for the realization of three-focal optical ophthalmological i...

The two-photon polymerization (2PP) technique is a powerful tool for the fabrication of submicron resolution 3D microstructures. The high flexibility and relatively low costs allow to use this technique not only for 3D structuring but also for the forming of diffi'active microrelief. Due to two-photon absorption, higher resolution than it could be...

Application of the two-photon polymerization (2PP) technique for the fabrication of submicron-size relief of radial binary diffractive optical elements (DOE’s) is studied. Binary DOE’s for the formation of special longitudinal intensity distribution (axial light segment) are realized. Interferometric investigations of the diffractive relief produce...

By observing the TEA CO2 laser generation dynamics during the intracavity processing of reflecting surfaces, physical mechanisms responsible for the fabrication of periodic sub-micrometer structures are studied.

The analytical and experimental investigations describing the intracavity processing of different solid-sate materials (Al, Cr, Ge, Si) are presented. New designs of the laser cavity were explored to facilitate the fabrication of structures composed of a system of equidistant parallel 250 nm-sized grooves and periodic micro-dots on massive samples...

In this work it is shown the possibility of the nano-size periodic structures forming on the surface of semiconductor monocrystals with low reflectivity by means of the intracavity laser processing. For this aim the special laser resonator has been designed, which allows to produce extremely narrow high-quality periodic surface structures, looking...

12 In this work there is described the improved construction of laser cavity which makes possible to form submicron periodic structures on the surface of such perspective but not high- reflective materials as semiconductor single-crystals. The experimental investigation of the intracavity processing of the pure single-crystalline surface of germani...

On the base of the original intracavity method there is proposed a new approach for creation nanometric structures on the solid state surfaces with reflectivity magnitude near to the Fresnel coefficients of reflection. The further modernization of the laser cavity construction makes possible to fabricate periodic microstructures on the surface of s...

The one-pulse intracavity processing of the solid-state surface by the radiation of the 150-ns TEA carbon dioxide laser allowed to form the system of supernarrow (less than 0.3 micrometer) equidistant parallel grooves on thin metallic films, evaporated on glass substrates. Later, the more complicated structures, looking as the grids and the regular...

The application of solid state lasers radiating in near infrared and visible spectral range for the intracavity fabrication of submicron periodic surface structures on high-reflecting solid-state surfaces such as the surface of massive metals and semiconductors or their films is described. The surface of dielectric materials may be processed by the...

There are discovered physical aspects of one-pulse laser forming of 2D periodical surface microstructures with the characteristic sizes about 30 times less than the used laser radiation wavelength. It is experimentally shown that by means of TEA carbon dioxide laser treatment of the 800 Ao-aluminum film, evaporated on the K8-glass substrate, the pe...

In this work it is reported about the further development of the intracavity method of the solid state surface processing by the laser radiation. It is experimentally shown the possibility to form 2D periodical micron and submicron surface structures, looking as a system of squares, rectangles and parallelograms. A new type of the laser cavity allo...

The aim of this paper is the theoretical and experimental study of the mode structure laser radiation influence on the basic parameters of the sharp periodical submicron structures (grooves) system which is formed on the solid- state surface by means of the intracavity method. It is shown that the longitudinal resonator mode influence is one of the...

The intra-resonator method suggested for producing periodic structures on optical surfaces as a result of the formation of an appropriate multi-beam interference pattern on one of the mirrors of the resonator with parameters prescribed in a certain way allows one to draw up a system of high-contrast equidistant lines in a region whose dimensions ar...

A method of producing submicron (hundreds of nanometers and less) periodical structures on the solid state surface by means of one-pulse laser radiation treatment is developed. The resulting structures look like a system of narrow parallel equidistant grooves. Before a treatment the surface may be covered by one of several thin layers to be destroy...