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2013 | 124 | 2 | 321-328
Article title

Czochralski Growth and Optical Properties οf (Lu_{x}Gd_{1-x})_2SiO_5 Solid Solution Crystals Single Doped with Sm^{3+} and~Dy^{3+}

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Abstracts
EN
Solid solution crystals (Lu_{x}Gd_{1-x})_2SiO_5 single doped with Sm^{3+} and Dy^{3+} were grown by the Czochralski method. Segregation coefficients Lu/Gd, melting temperatures and structures of solid solution crystals were determined for 0.15 ≤ x ≤ 0.8. It was found that for x ≥ 0.17 the crystals belong to the monoclinic system within a space group C2/c and their melting temperature diminishes monotonously from 1990C to 1780C when x decreases from 0.8 to 0.15. Disparity of ionic radii of Lu^{3+} and Gd^{3+} induces structural disorder that brings about an inhomogeneous broadening of spectral lines in absorption and emission spectra of incorporated luminescent Sm^{3+} and Dy^{3+} ions. Optical properties of obtained crystals were determined based on results of measurement of absorption and emission spectra and luminescence decay curves. Spectroscopic investigation revealed that Sm^{3+} doped crystals show intense emission distributed in the visible-near infrared region with the most intense band centred at 605 nm and characterized by a branching ratio of 0.43. Emission spectrum of Dy^{3+} doped crystals is dominated by a band centred at 575 nm and characterized by a branching ratio of 0.58. It has been concluded that the systems under study are potential laser materials able to generate visible emission upon GaN/InGaN laser diode pumping.
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Contributors
  • Institute of Low Temperature and Structure Research, Polish Academy of Sciences Okólna 2, 50-422 Wrocław, Poland
author
  • Institute of Low Temperature and Structure Research, Polish Academy of Sciences Okólna 2, 50-422 Wrocław, Poland
author
  • Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
author
  • Institute of Low Temperature and Structure Research, Polish Academy of Sciences Okólna 2, 50-422 Wrocław, Poland
author
  • Institute of Low Temperature and Structure Research, Polish Academy of Sciences Okólna 2, 50-422 Wrocław, Poland
author
  • Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
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Document Type
Publication order reference
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bwmeta1.element.bwnjournal-article-appv124n221kz
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