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Nonlinear optics at nanoscale is a recent fascinating research field. Among the numerous nonlinear optics phenomena, due to its significant implications from both fundamental and applicative point of view, stimulated Raman scattering is one of the most interesting. In this paper, the observations of stimulated Raman scattering in silicon nano-particles, at the wavelengths of interest for telecommunications,...
Nonlinear optics at nanoscale is a recent fascinating research field. Among the numerous nonlinear optics phenomena, due to its significant implications from both fundamental and applicative point of view, stimulated Raman scattering is one of the most interesting. In this paper, the observations of stimulated Raman scattering in silicon nano-particles, at the wavelengths of interest for telecommunications,...
Thin-film crystalline photovoltaic (PV) cell is a trend for future PV with its potential to achieve low cost and high efficiency. Concerning material utilization efficiency, we propose a method with a fast manufacturing method of thin crystalline Si by chemical solution. To obtain the highest efficiency of material utilization, experiments with different H2O2/HF ratio are conducted, where related...
Nanohole structures were implemented at various layers in amorphous silicon thin film solar cells designed using 2D and 3D CAD software. Electrical and optical properties of the photovoltaic cell are obtained by modeling such structures using solar cell utility packages. Absorption improvement and thereby conversion efficiency improvement have been achieved over the 300 to 600nm solar spectrum. In...
It is determined that the content of Ge in the volume of germanium-silicate glass (GSG) influences density of nanocrystalline grains. It is ascertained that germanium atoms are unevenly distributing between separate nanoclusters as well as in the limits of one cluster. The size and density of germanium nanoclusters may be independently checked by the way of changing of germanium content in the composition...
Silicon rich oxide has shown photoemission. However, normally it is required a high temperature annealing in order to get intense emission. On the other hand, Si nanocrystals, nC, obtained by electrochemical methods and poured in a solutions have shown photoemission that depends on their size. Then, Si nC obtained by electrochemical methods are an alternative to obtain emissive silicon rich oxide...
The microstructure and electromagnetic properties of FeCoB-SiO2 thin films which were deposited on different substrates (silicon, glass and Mylar) by using magnetron sputtering were studied. X-Ray Diffraction revealed that FeCo nanocrystalline only precipitated in FeCoB-SiO2 thin films on silicon and glass substrates, and the FeCoB-SiO2 films on Mylar substrate were amorphous. The surface images obtained...
In this paper, ZnO nanorods were synthesized by the hydrothermal process on various substrates such as glass, ITO, p-type porous silicon and n-type porous silicon by dipping in ZnO solution and atomic layer deposition method. The thin films a grown on substrates were washed with deionized water to eliminate residual salts, dried in air, and annealed at 400 degC. Scanning electron microscopy and X-ray...
The process of formation and properties of Ge-silicate glasses (GSG) in the process of oxidation of the Ge-doped nanostructured polycrystalline silicon films (NSF PCS) has been investigated. The dependences of heating effects in the process of linear heating of grinded GSG are shown.
We report here design and experimental results on surface-normal optical filters and broadband reflectors based on Fano resonances in patterned single crystalline silicon nanomembranes (SiNM). Patterned SiNM structures were fabricated and transferred onto transparent glass substrates, using a direct wet transfer process. The measured transmission results agree well with the designs for the filter...
We report the measured characteristics of optical filters based on Fano resonances in patterned single crystalline silicon nanomembranes, transferred onto glass and plastic substrates. The observed angle dependent transmission and waveguiding effects are also reported.
Bulk nanostructured (Bi,Sb)2Te3 compounds and GeTe based amorphous/nanocrystal composites have been successfully fabricated by the combined hydrothermal/hot-pressing and quenching/annealing methods, respectively. The (Bi,Sb)2Te3 nanopowders synthesized by hydrothermal method exhibit a hollow-like structure. After hot-pressing, the nanoscale grains varying from tens to hundreds of nanometers were found...
Nanostructuring is one of the effective approaches to lower the thermal conductivity of materials. Nanostructured skutterudite-related compounds CoSb3, Fe0.5Ni0.5Sb3, Fe0.25Ni0.25Co0.5Sb3 and Te-doped CoSb3 were synthesized by a solvothermal route. The bulk materials were prepared by hot pressing or spark plasma sintering from the solvothermally synthesized nanopowders. The thermal conductivity values...
This paper reports the first result of press molding of Pyrex glass using a silicon carbide (SiC) mold with nanopatterns. First, the nanopatterns were formed on a silicon substrate by electron beam lithography and fast atom beam (FAB) etching. To transfer these patterns to SiC, SiC was deposited on the patterned silicon substrate, and the SiC surface was polished to mirror finish. Subsequently, a...
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