Перегляд за Автор "Beloshenko, K.S."

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Self-diffraction effect observation and recording the holographic one-dimensional and two-dimensional gratings in thin photosensitive films
(Institute for Single Crystals, 2007) Ageev, L.A.; Beloshenko, K.S.; Makovetsky, E.D.; Miloslavsky, V.K.
A setup for observation of the nonlinear self-diffraction effect has been described. A semiconductor laser (P approximately 50mW, wavelength approximately 660nm) is used as a radiation source. The laser beam is divided into two beams by a Wollaston prism, the beams pass through a polarizer and positive lens, then they intersect and create an interference. Using a microscope, the interference may be observed in an increased scale on a remote screen. The interference is registered in a thin photosensitive As2S3-Ag film prepared by vacuum evaporation. We have shown an opportunity to observe the self-diffraction from recorded diffraction grating with linear grooves and from two-dimensional grating induced as a result of second exposure after turning the convergence plane of the interfering beams by 90 degrees.
Thermostimulated implantation of nanoscaled Ag particles into a quartz glass using a CO2 laser beam
(Institute for Single Crystals, 2007) Ageev, L.A.; Miloslavsky, V.K.; Makovetsky, E.D.; Beloshenko, K.S.; Stronsky, A.V.
Coloration of fused quartz with colloidal silver (particle radius a ≈ 3 nm) is realized by irradiation of thin (≈ 10 nm) granular Ag film on a quartz plate by a continuous Gauss beam of CO2 laser (λ = 10.6 μm, P = 30 W). Using the AFM microscopy, a relief of the colored surface has been revealed. It is formed by oval lugs with mean transversal size of about ≈ 0.2 μm and heights of several nanometers. The relief is created due to surface deformation caused by subsurface Ag granules. The measured absorption spectrum of the colloid has shown that the absorption band contour is similar to the Lorentz one, maximum being at ω_m = 4.48*10^15 s^(-1), and half-width is γ = 0.714*10^15 s^(-1). Making use of Maxwell-Garnett theory, it has been found that for this colloid, the filling factor is q ≈ 0.05 to 0.10 and coloration depth h ≈ 50 to 100 nm.