Browsing by Author "Padlyak, B. V."

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Cathodoluminescence of the un-doped and doped noncrystalline lithium – potassium – borate compounds
(Видавництво національного університету „Львівська політехніка”, 2009) Adamiv, V. T.; Padlyak, B. V.; Savczyn, V. P.; Teslyuk, I. M.; Burak, Ya. V.
EPR Spectroscopy of the Lithium Tetraborate Glasses Doped with Ag
(2017-05-29) Padlyak, B. V.; Tataryn, V. Ya.; Drzewiecki, A.; Padlyak, T. B.; Adamiv, V. T.; Teslyuk, I. M.; University of Zielona Góra, Institute of Physics, Division of Spectroscopy of Functional Materials; a Szafrana Str., 65-516 Zielona Góra, Poland; Vlokh Institute of Physical Optics, Department of Optical Materials; Dragomanov Str., 79005 Lviv, Ukraine; Lviv Polytechnic National University, Institute of Telecommunications, Radioelectronics and Electronic; Engineering, Department of Photonics, 1 St. Yura Sq., 79013 Lviv, Ukraine
Epr spectroscopy of the Mn2+ and Cu2+ centres in lithium and potassium-lithium tetraborate glasses
(Видавництво національного університету “Львівська політехніка”, 2009) Padlyak, B. V.; Wojtowicz, W.; Adamiv, V. T.; Burak, Ya. V.; Teslyuk, I. M.
Nature of Intrinsic Luminescence of the Undoped Borate Glasses
(2017-05-29) Kindrat, I. I.; Padlyak, B. V.; Mahlik, S.; Kukliński, B.; Lisiecki, R.; University of Zielona Góra, Institute of Physics, Division of Spectroscopy of Functional Materials; a Szafrana Str., 65-516 Zielona Góra, Poland; Vlokh Institute of Physical Optics, Sector of Spectroscopy, 23 Dragomanov Str., 79-005 Lviv, Ukraine; University of Gdańsk, Institute of Experimental Physics, Condensed Matter Spectroscopy Division; Wita Stwosza Str., 80-952 Gdańsk, Poland; Institute of Low Temperature and Structure Research Polish Academy of Sciences, Division of Optical; Spectroscopy, 2 Okólna Str., 50-422 Wrocław, Poland
Optical spectroscopy of Nd-doped borate glasses
(Видавництво Львівської політехніки, 2012) Padlyak, B. V.; Ryba-Romanowski, W.; Lisiecki, R.; Adamiv, V. T.; Burak, Ya. V.; Teslyuk, I. M.
Optical absorption, luminescence excitation and emission spectra as well as luminescence kinetics of the Nd3+ centres in glasses with Li2B4O7:Nd, LiCaBO3:Nd, and CaB4O7:Nd compositions containing 0.5 and 1.0 mol. % Nd2O3 have been investigated and analyzed. Using Judd-Ofelt theory oscillator strengths (f) and phenomenological intensity parameters W t ( W 2, W 4, and W 6) for all investigated glasses were determined. Radiative transitions rates (Wr), radiative lifetimes (τrad), and branching ratios (β) for Nd3+ centres have been calculated. Measured lifetimes for Nd3+ centres in the 4F3/2 emitting level are compared with those calculated and quantum efficiency (h) have been estimated.
Optical spectroscopy of Nd3+ luminescence centres in the Sr4B14O25:Nd crystal
(Видавництво національного університету “Львівська політехніка”, 2009) Padlyak, B. V.; Ryba-Romanowski, W.; Lisiecki, R.; Oseledchik, Yu. S.; Prosvirnin, A. L.; Kudryavtcev, D. P.; Svitanko, N. V.
Synthesis and optical spectroscopy of borate glasses, doped with terbium and dysprosium
(Видавництво Львівської політехніки, 2012) Padlyak, B. V.; Pieprzyk, B.; Drzewiecki, A.; Adamiv, V. T.; Burak, Ya. V.; Teslyuk, I. M.
The high optical quality glasses with CaB4O7:Tb, LiCaBO3:Tb, CaB4O7:Dy, and LiCaBO3:Dy compositions containing 0.5 and 1.0 mol. % Tb2O3 and Dy2O3 have been obtained. By electron paramagnetic resonance (EPR) and optical spectroscopy it was shown that the Tb and Dy impurities are incorporated in the CaB4O7 and LiCaBO3 glass network as Tb3+ (4f8, 7F6) and Dy3+ (4f9, 6H15/2) ions, exclusively. All observed f – f transitions of Tb3+ and Dy3+centres in optical absorption, luminescence excitation and emission spectra have been identified. Luminescence kinetic shows single exponential decay for Tb3+ and Dy3+ centres in the CaB4O7 and LiCaBO3 glasses. Lifetimes for main emitting levels of Tb3+ and Dy3+ centres in all investigated glasses were determined at T = 300 K. Spectroscopy shows that obtained glasses are promising luminescent materials.
Ultraviolet Photoluminescence of the Gd3+ Centres in Borate Glasses
(2017-05-29) Padlyak, B. V.; Drzewiecki, A.; Padlyak, T. B.; Adamiv, V. T.; Teslyuk, I. M.; University of Zielona Góra, Institute of Physics, Division of Spectroscopy of Functional Materials; a Szafrana Str., 65-516 Zielona Góra, Poland; Vlokh Institute of Physical Optics, Department of Optical Materials; Dragomanov Str., 79-005 Lviv, Ukraine