Up-conversion luminescence from Nd~(3+) ions doped in NaBi(WO_4)_2 single crystal
来源期刊：JOURNAL OF RARE EARTHS2009年第6期
论文作者：HUANG Yanlin QIAO Xuebin SHI Liang Hyo Jin SEO WEI Donglei
Key words：optical materials; NaBi(WO_4)_2; neodymium; up-conversion luminescence; rare earths;
Abstract: The luminescence of Nd~(3+)-doped in NaBi(WO_4)_2 single crystal was investigated from 10 K to room temperature. The excitation source was a pulsed dye laser in resonance into the (~4G_(5/2)+~2G(1)_(7/2)) levels of Nd~(3+) ions. Several blue emission bands in the up-conversion lu-minescence spectra corresponded to transitions from ~2P_(1/2) to ~4I_(9/2). Some violet bands corresponding to transitions of ~4D_(3/2)→(~4I_(9/2), ~4I_(11/2), ~4I_(13/2)) 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 Nd~(3+) ions was the dominant mechanism in this crystal.
HUANG Yanlin1，QIAO Xuebin2，SHI Liang2，Hyo Jin SEO2，WEI Donglei1
(1.College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China;
2.Department of Physics,Pukyong National University,Busan 608-737,Republic of Korea)
Abstract:The luminescence of Nd~(3+)-doped in NaBi(WO_4)_2 single crystal was investigated from 10 K to room temperature. The excitation source was a pulsed dye laser in resonance into the (~4G_(5/2)+~2G(1)_(7/2)) levels of Nd~(3+) ions. Several blue emission bands in the up-conversion lu-minescence spectra corresponded to transitions from ~2P_(1/2) to ~4I_(9/2). Some violet bands corresponding to transitions of ~4D_(3/2)→(~4I_(9/2), ~4I_(11/2), ~4I_(13/2)) 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 Nd~(3+) ions was the dominant mechanism in this crystal.
Key words:optical materials; NaBi(WO_4)_2; neodymium; up-conversion luminescence; rare earths;
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