In this work we analyze the field effect in granulated metal films and propose the current switching device utilizing this effect. It is shown as a result of numerical modeling that efficient current modulation can be achieved in thin granulated films if the charging energy of metallic granules is at least several times higher than the thermal energy kT.
We present a new modulation technique by the control of latenil modal gain profile in four-terminal stepped-mesa diode laser. The simulation of the high frequency laser characteristics is performed on the basis of a computer model of stripe geometry diode laser which takes into account lateral effects. Modulaflon bandwidth of II GHz for ridge laser can be extended for 5 6 GHz by employing a newly developed stepped-mesa laser design. ...
A new metbod for the fabrication of monodisperse metallic nanostructures is described. The method is based on laser ablation of Cu target and subsequent fission of the splashed liquid Cu drops resulting from drops charging in the laser torch plasma up to instability threshold. The monodisperse charged nanoparticles produced by fission are directed to the substrate by the external electric field. The final stage of structure formation is free air ...
We have found the essential linear polarization anisotropy in the reflection spectra of open nanowires over a wide spectral range. Two mechanisms are responsible for the anisotropy. The first one displayed in exciton resonance region is due to the distribution anisotropy of the electric component of the electromagnetic field in the vicinity of open nanowires. The second one connected with the background reflection spectra over the whole spectral range is ...
A new method for the fabrication of 10 nm metallic granules is suggested, which is based on fission of liquid drops produced by laser oblation. A monolayer of such granules was deposited on the insulating substrate and then partly oxidized in air. It is shown that the conductivity of this layer, measured in lateral geometry, occurs due to electron tunneling between oxidized metallic granules having the charging energy as high ...
The XPS-TEM study of Cu/SiO2 composite metal-insulator films allowed us to develop the diagnostics of the chemical states of metal atoms and the parameters of the ensembles of metal-clusters and metal-atoms which are important for single-electron tunnelling processes.
Results on Cu K-edge x-ray absorption study of copper dispersed in SiO2 are reported. Randomly distributed in as-made samples at low concentration, copper atoms tends to form clusters at larger concentrations. The cluster size reaches a size of 20 to 50 A after which the cluster growth stops. Only the first-neighbour peak is observed in as-made samples indicating either a very strong disorder in clusters or their low-dimensionality. Annealing results ...
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