Abstract. The thickness dependences of the thermoelectric parameters were observed at room temperature for nanostructures p-PbTe, grown from the vapor phase on polyamide film substrates. An attempt to explain detected dependences in the range of quantum theory was done.

The ellipsometric parameters Δ and Ψ for amorphous ferromagnetic alloys in the dielectric matrix, (Co41Fe39B20) (SiO2)1− , have been measured in the spectral interval = 0.24÷1.0 m (ℎ = 1.24÷5.15 eV) at various-values. On the basis of the data obtained, the spectral dependences of the optical conductivity, (ℎ), in those nanocomposites are studied. The dimensions of ferromagnetic particles were varied from 2 to 10 nm. The surface structure of nanocomposites is researched, by using scanning atomic force microscopy. The optical properties of nanocomposites are found to depend not only on the metal phase content, but also on the properties of interface regions, which are significantly different at metal phase contents above and below the percolation threshold.

The systems "thin Ni film-lithium niobate" and "thin Pd film-lithium tantalate" are implanted by Ar + ions with an energy of 100 keV and a dose of 10 16 cm-2. Analyses of the systems by AFM and SEM have shown that the ion implantation essentially modifies the near-surface structure resulting in a change of its optical, electrical, and mechanical properties. Strong difference in the near-surface structures between implanted systems with Ni or Pd thin films is observed. Such a difference is explained by the heterogeneity of an ion beam and different properties of the materials. The application to the development of high-sensitive pyroelectric detectors with high damage threshold is proposed.

Abstract. Ion implantation by keV Ar+ ions creates blisters on the surface of thin Ni films deposited on lithium niobate and causes changes in optical properties and structure of Ni film and lithium niobate substrate. Processes of ion implantation and effects of increasing absorption, adhesion, damage threshold are described and explained in the paper. Development of pyroelectric photodetector "thin Ni film -lithium niobate" is proposed.

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