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Influence of vapor transport equilibration on Raman spectra of Er:LiNbO3 crystals by Delong Zhang; Xiaojun Chen; Yufang Wang; Dengsong Zhu; Bo Wu; Guoxiang Lan is a Materials Science article available to read on EtoBox.

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Raman spectra of as-grown and vapor transport equilibration (VTE) treated Er:LiNbO 3 crystals, which have different cut orientations (X-cut and Z-cut), different Er-doping levels (Er:(0.2, 0.4 and 2.0 mol%)LiNbO 3 ) and different VTE durations (80, 120, 150 and 180 h), were recorded at room temperature in the wavenumber range 50±1000 cm 21 by using backward scattering geometry. The spectra were attributed on the basis of their spectral features and the previous experimental work and the most recent theoretical progress in lattice dynamics on pure LiNbO 3 . In comparison with the pure crystal the most remarkable effect of Er-doping on the Raman spectrum is observed for the E(TO 9 ) mode. It does not appear at 610 cm 21 as the pure crystal, but locates at 633 cm 21 . In addition, the doping also results in the lowering of the Raman phonon frequency, the broadening of the Raman linewidth and the changes of the relative Raman intensity of some peaks. The VTE treatment results in the narrowing of the linewidth, the recovery of the lowered phonon frequency and the further changes of relative Raman intensity. The narrowing of Raman linewidth indicates that the VTE processing has brought t

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Author

Delong Zhang; Xiaojun Chen; Yufang Wang; Dengsong Zhu; Bo Wu; Guoxiang Lan

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0022-3697)

Published

2002

Language

EN

Field

Materials Science (Physical Sciences)