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- W1965506118 abstract "Abstract Polarized visible and infrared emission characteristics of Er 3+ ions in vapor-transport-equilibration (VTE)-treated LiNbO 3 crystals codoped with different concentrations of Zn and Er were investigated in comparison with corresponding as-grown crystals. The results show that the VTE treatment leads to substantial spectral changes of Er 3+ emissions at 0.65, 0.98 and 1.5 μm regions, and the spectral changes in the 0.98 and 1.5 μm regions appear to be Zn-concentration-dependent. It is concluded in combination with X-ray powder diffraction results and optical absorption characteristics reported previously that the VTE treatment resulted in crystalline phase transformation with respect to Er 3+ ions from original LiNbO 3 to ErNbO 4 phase in all crystals studied. The formation of the ErNbO 4 phase and the Zn 2+ codopants are responsible for the VTE-induced substantial spectral changes. The emission characteristics of the ErNbO 4 precipitates in the Zn/Er-codoped crystals are found to be very different from those of the ErNbO 4 precipitates in the only Er-doped crystal in the infrared region, and the difference is attributed to the influence of the Zn 2+ codopant on the Er 3+ ion environment. The mechanism of the crystalline phase transformation is qualitatively explained from the viewpoint of the declined solubility of Er 3+ ion in a Li-rich LiNbO 3 crystal and from the phase diagram of Li 2 O–Nb 2 O 5 system." @default.
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- W1965506118 date "2008-10-01" @default.
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- W1965506118 title "Emission characteristics of Er3+ in vapor-transport-equilibrated Er/Zn-codoped LiNbO3 crystals" @default.
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- W1965506118 doi "https://doi.org/10.1016/j.jlumin.2008.03.017" @default.
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