Fyzikální ústav Akademie věd ČR

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Research subjects at department 28

Complex investigations of point defects in ZnO are proposed in the present project. Positron annihilation spectroscopy (PAS) including also variable energy PAS using slow positron beam will be used as a principal technique for defect studies. State–of–art ab-initio theoretical calculations will be employed for interpretation of PAS data. Defects in ZnO single crystals will be compared with those in epitaxial and nanocrystalline ZnO thin films.  The full text >>

Pulsed laser deposition (PLD) is well introduced technique for preparation of thin films. However, it has not been realized using a laser operating in the extremely ultraviolet (XUV) spectral range. Interaction of XUV light with matter exhibits several features, which makes it much different in respect to the effect of radiation incidence in ultraviolet, visible and infrared range. Photons of XUV radiation generated by repetition capillary laser of energy 26.4 eV are absorbed in the matter mainly via photoeffect.  The full text >>

The project deals the utilization of an advanced thin-film plasma technology in a vacuum and microwave technique. It is expected a significant improvement on a serviceability of the final products. The project is segmented to three main research&development areas:

  1. low-emissivity coating of the control grid of electrontube,
  2. blacking of anod for enhancement of the thermal absorption,
  3. metal-plating of the functional surface of microwave devices considering the long term stabilit
  The full text >>

The project deals with preparation of chemical gas sensors based on sensitive layers of nanocomposite of organic substance (phthalocyanines, metallocenes) and metallic nanoparticles. The sensitive layers are prepared by technology of organic molecular evaporation in ultra-high vacuum. The metallic nanoparticles are prepared by means of magnetron sputtering or thermal evaporation. The formation of nanoparticles is stimulated by subsequent thermal treatment.  The full text >>

We propose to develop a new class of materials providing strong magneto-optical phenomena (such as strong Kerr or Faraday effect). Such material properties are required for many unique optical applications, such as magneto-optical isolators, optical switches or true half-mirrors. The design of novel materials is based on a combined theoretical approach (ab-initio calculations), materials synthesis (in both bulk and thin-film form), followed by a careful characterization (structure, magnetic properties, electronic structure, optical and magneto-optical characterization).  The full text >>

The aim of the project is to develop methods for monitoring of preparation of metallic nanostructures on dielectric surface in deposition systems involving combination of magnetron sputtering, pulsed laser deposition and ion beam assistance. The study provides better understanding of film growth mechanism – growth modes relating to growth conditions of metals nanostructures on dielectric materials.  The full text >>

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