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Optical Spectroscopy of the Nd^{3+} Luminescence Centres in the Sr_{4}B_{14}O_{25}:Nd Crystal

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Padlyak B., Ryba-Romanowski W., Lisiecki R., Oseledchik Y., Prosvirnin A., Kudryavtcev D., Svitanko N.

issue 1

104-110

Optical absorption, emission and luminescence kinetics of Nd^{3+} centres in the new borate crystal with Sr_{4}B_{14}O_{25}:Nd (Nd content 0.2 wt.%) composition are investigated and analysed. The oscillator strengths (P_{theor} and P_{exp}) for observed absorption transitions and phenomenological intensity parameters Ω_t (Ω_2=1.59×10^{-20} cm^{-1}, Ω_{4} = 2.06 × 10^{-20} cm^{-1}, and Ω_{6} = 2.28 × 10^{-20} cm^{-1} were calculated based on the standard Judd-Ofelt theory. Using Ω_t parameters the radiative transitions rates (W_{r}), branching ratios (β) and radiative lifetime (τ_{rad}) for Nd^{3+} centres in the Sr_{4}B_{14}O_{25}:Nd crystal were calculated and analysed. Measured lifetime (τ_{exp} = 105 and 93 μs at T = 10 and 300 K, respectively) is compared with this calculated (τ_{rad} = 331 μs) and quantum efficiency for Nd^{3+} centres from ^{4}F_{3/2} emitting level in the Sr_{4}B_{14}O_{25}:Nd crystal is estimated (η ≅ 30%). Incorporation peculiarities and local structure of Nd^{3+} luminescence centres in the Sr_{4}B_{14}O_{25} crystal and corresponding glass with 4SrO-7B_{2}O_{3} composition are discussed on the basis of referenced X-ray diffraction data and presented results.

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1 Acta Physica Polonica A

1 2010

1 Kudryavtcev D.

1 Lisiecki R.

1 Oseledchik Y.

1 Padlyak B.

1 Prosvirnin A.

1 Ryba-Romanowski W.

1 Svitanko N.

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Optical Spectroscopy of the Nd^{3+} Luminescence Centres in the Sr_{4}B_{14}O_{25}:Nd Crystal