The self-organized rodlike microstructure of terbium-scandium-aluminum garnet-terbium-scandium perovskite, Tb 3 Sc 2 Al 3 O 12 -TbScO 3 , eutectic crystals has been studied. The growth of the eutectic by the micro-pulling down method is presented. The obtained self-organized dielectric microstructure is made of perovskite fibers embedded in a garnet phase matrix. The crystal quality of both phases is confirmed by the structural analysis. Both phases can be etched away, depending on the composition, leaving a pseudo-hexagonally packed dielectric array of pillars or an array of pseudo-hexagonally packed holes in dielectric material. Both structures can be filled with metal or another material and, hence, have possible metamaterials or photonic crystals applications.

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The energy level position of the P?* ion in YAlO3 md dynnmics of the 'Ga, '02 and 'Po excited states have been analysed. The mechanism of orange and infrared light upconversion into blue 'Postate emission has been elucidated and has been considered for passible use in a blue-wavelength laser. Two-photon absorption transitions from the 3H4 ground state to the 'Pz manifold Were observed and compvrrd in intensity with the excited-state transitions via the intermediate 'Gq manifold.

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