Up-conversion luminescence from Nd³⁺ ions doped in NaBi（WO₄）₂ single crystal

魏东磊¹，黄彦林¹，施亮²，乔学斌²，徐孝镇²

1. College of Chemistry,Chemical Engineering and Materials Science,Soochow University2. Department of Physics,Pukyong National University

摘 要：The luminescence of Nd3+-doped in NaBi（WO4）2 single crystal was investigated from 10 K to room temperature.The excitation source was a pulsed dye laser in resonance into the（4G5/2+2G（1）7/2） levels of Nd3+ ions.Several blue emission bands in the up-conversion luminescence spectra corresponded to transitions from 2P1/2 to 4I9/2.Some violet bands corresponding to transitions of 4D3/2→（4I9/2,4I11/2,4I13/2） were also observed.For comparison,the luminescence spectra and decay curves excited by the pulsed 355 nm laser were measured.In order to investigate up-conversion mechanisms,the decay behavior and the dependence of the up-conversion luminescence on laser powers were investigated.The temporal decay behavior of the up-conversion luminescence indicated that the two-photon excited state absorption of the Nd3+ ions was the dominant mechanism in this crystal.

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