IRTUM – Institutional Repository of the Technical University of Moldova

Browsing Articole din publicaţii internaţionale by Author "FREY, S."

Browsing Articole din publicaţii internaţionale by Author "FREY, S."

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  • Efficient focusing with a concave lens based on a photonic crystal with an unusual effective index of refraction 
    FOCA, E.; FÖLL, H.; DASCHNER, F.; SERGENTU, V. V.; CARSTENSEN, J.; FREY, S.; KNÖCHEL, R.; TIGINYANU, I. M. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2005)
    This work reports measurements with a concave lens based on a photonic crystal (PC) structure, which was designed to have an effective index of refraction neff < 1 or even < 0, and which is intended as a model system for ...
  • Fast pore etching 
    FREY, S.; KEMELL, M.; CARSTENSEN, J.; LANGA, S.; FÖLL, H. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2005)
    The growth of silicon macropores under high current densities and high HF concentrations is studied. A new growth mode for porous Si has been found where pores resemble the so-called current line oriented pores previously ...
  • Uniform and Nonuniform Nucleation of Pores during the Anodization of Si, Ge, and III-V Semiconductors 
    LANGA, S.; CARSTENSEN, J.; CHRISTOPHERSEN, M.; STEEN, K.; FREY, S.; TIGINYANU, I. M.; FÖLL, H. (The Electrochemical Society, Inc., 2005)
    Morphology is one of the basic characteristics of porous layers. For electrochemically grown pores, morphology is strongly dependent on the starting phase of pore growth, the so-called nucleation phase. This paper addresses ...
  • Waveguide Structures Based on Porous Indium Phosphide 
    LANGA, S.; FREY, S.; CARSTENSEN, J.; FÖLL, H.; TIGINYANU, I. M.; HERMANN, M.; BÖTTGER, G. (The Electrochemical Society, 2005)
    We researched the possibilities for engineering the morphology of porous structures in n-InP. Lithographic patterning of the sample surface before anodic etching was shown to modify considerably the electric field distribution ...

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