Browsing by Author "Kaminska, A."
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Item Equation of state and pressure dependence of lattice parameter of gadolinium gallium garnet crystals(Видавництво національного університету „Львівська політехніка”, 2009) Durygin, A.; Paszkowicz, W.; Buczko, R.; Kaminska, A.; Saxena, S.; Suchocki, A.Item Spectroscopic Properties of Y4Al2O9:Ce Crystals under High Pressure(2017-05-29) Wang, Yongjie; Suchocki, A.; Ciesielska, M.; Kaminska, A.; Zhydachevskii, Ya.; Turczyński, S.; Pawlak, D. A.; Malinowski, M.; Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland; Institute of Physics, Kazimierz Wielki University, Weyssenhoffa 11, 85-072 Bydgoszcz, Poland; Cardinal Stefan Wyszynski University, College of Science, Department of Mathematics and Natural; Sciences, Dewajtis 5, 01-815 Warsaw, Poland; Institute of Electronic Materials Technology, Wólczynska 133, 01919 Warsaw, Poland; Institute of Microelectronics and Optoelectronics, Warsaw University of Technology; ul. Koszykowa 75, 00-662 Warsaw, PolandItem Spectroscopy of gadolinium gallium garnet doped with cerium under high hydrostatic pressure(Видавництво Львівської політехніки, 2012) Kaminska, A.; Duzynska, A.; Berkowski, M.; Suchocki, A.Studies of the spectroscopic properties of Ce3+ dopant in bulk Gd3Ga5O12:Ce crystal under pressure are presented. In spite of strong inter-shell 4f ® 5d absorption bands at ambient pressure the cerium luminescence in Gd3Ga5O12 is entirely quenched even at low temperature. It has been shown that applying pressure allows for recovering the 5d ® 4f radiative transitions. Further increase of pressure improves the emission efficiency. This effect is analyzed in terms of two possible phenomena: (i) by pressure-induced electronic crossover of the excited 5d energy level of the Ce3+ with the conduction band bottom of host crystal, and (ii) by decrease of electron-lattice coupling with increasing pressure, resulting in reducing of Stokes shift and non-radiative transitions between the low vibrational levels of the 5d state and high vibrational levels of the ground 4f state.Item Study of Luminescence Properties of Yb3+ - Doped Oxides Using High Hydrostatic Pressure(2017-05-29) Kaminska, A.; Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland; Cardinal Stefan Wyszynski University, College of Science, Department of Mathematics and Natural; Sciences, Dewajtis 5, 01-815 Warsaw, Poland