Zinc doping effect on the optical bands of cr³⁺ in LiNbO₃: Zn, Cr crystals

M. Voda Departamento de Fisica de Materiales C-IV, Universidad Autónoma de Madrid, Madrid, 28049, Spain

U. Caldiño G Departamento de Fisica de Materiales C-IV, Universidad Autónoma de Madrid, Madrid, 28049, Spain

J. García Solé Departamento de Fisica de Materiales C-IV, Universidad Autónoma de Madrid, Madrid, 28049, Spain

F. Jaque Departamento de Fisica de Materiales C-IV, Universidad Autónoma de Madrid, Madrid, 28049, Spain

Abstract

The optical absorption and luminescence of Cr³⁺ ions in ZnO doped LiNbO₃:Cr³⁺ crystals have been studied. It has been found that ZnO produces the same effect as that observed in MgO co-doped samples: A strong reduction in the Cr³⁺ concentration together with a shift in the ⁴A₂ → ⁴T₁ vibronic transition to lower energy. As in the case of MgO co-doped samples a new Cr³⁺ centre is formed in ZnO co-doped samples.

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Zinc doping effect on the optical bands of cr³⁺ in LiNbO₃: Zn, Cr crystals

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Zinc doping effect on the optical bands of cr3+ in LiNbO3: Zn, Cr crystals

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Zinc doping effect on the optical bands of cr³⁺ in LiNbO₃: Zn, Cr crystals