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光谱学与光谱分析

Pr^3＋：Y2SiO5中的反斯托克斯荧光谱及其对基态Stark分裂能级的确定

张衍亮, S Rộng, 李玉琼, 丁良恩, 王祖赓

Published Jan 1, 2004• 0 citations
OpenAlex

Abstract

掺杂在晶体Y2SiO5 (YSO)中的Pr3+, 运用脉冲激光激发3H4→1D2跃迁,粒子通过非辐射能量转移从能级 1D2转移到能级 3P0, 测得了对应于 3P0→3H4跃迁的反斯托克斯荧光光谱, 由此可确定 3H4的Stark分裂能级以及 3P0能级的能量高度. 与运用激光激发 3H4→1D2跃迁, 通过观察 1D2→3H4斯托克斯荧光光谱确定3H4的Stark分裂能级方法相比, 该过程避免了不同晶点位置中(Crystallographic site)Pr3+的 1D2能级间的能量转移影响, 从而具有较高的确定性. 同时, 我们观察了反斯托克斯荧光的时间特性.

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[Anti-stokes blue fluorescence and stark splitting of 3H4 in Pr3+:Y2SiO5 (YSO)].

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In the Pr3+ -doped Y2SiO5, the population in 1D2 of Pr3+ can be transferred to 3P0 state via non-radiative energy transfer by the laser excitation in resonance with 3H4-->1D2 , and we can experimentally study the Stark splitting of 3H4 energy level via 3P0 -->3H4 anti-Stokes emission spectra. Because the anti-Stokes emission spectra can avoid the energy transfer between different crystallographic site 1D2 energy levels, the above splitting lines attribution is more accurate than the assignment via 1D2-->3H4 Stokes spectra by the laser excitation in resonance with 3H4-->1D2. In addition, the character of the anti-Stokes fluorescence decay time was observed.

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In the Pr(superscript 3+) -doped Y2SiO5, the population in 1D2 of Pr(superscript 3+) can be transferred to 3P0 state via non-radiative energy transfer by the laser excitation in resonance with 3H4→1D2, and we can experimentally study the Stark splitting of 3H4 energy level via 3P0→3H4 anti-Stokes emission spectra. Because the anti-Stokes emission spectra can avoid the energy transfer between different crystallographic site 1D2 energy levels, the above splitting lines attribution is more accurate than the assignment via 1D2→3H4 Stokes spectra by the laser excitation in resonance with 3H4. In addition, the character of the anti-Stokes fluorescence decay time was observed.

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Acta Physica Sinica•Jan 1, 1995•1 citation

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Emission spectra of the 3P0 → 3H4 transition in Pr: β" alumina single crystals excited by both a broad-band blue source and by dye laser excitation at various wavelengths within the inhomogeneously-broadened 3H4 → 3P0 absorption line are considered. These spectra are strongly polarized, and are therefore due to Pr3+ ions in the Beevers-Ross (BR) sites. An approximately-axial model for the crystal field at a BR site predicts crystal field splitting of the 3H4 level and polarization selection rules which approximately match those we have observed.

Journal de Physique IV (Proceedings)•Apr 1, 1994•0 citations
掺杂在晶体Y2SiO5 (YSO)中的Pr3+, 运用脉冲激光激发3H4→1D2跃迁,粒子通过非辐射能量转移从能级 1D2转移到能级 3P0, 测得了对应于 3P0→3H4跃迁的反斯托克斯荧光光谱, 由此可确定 3H4的Stark分裂能级以及 3P0能级的能量高度. 与运用激光激发 3H4→1D2跃迁, 通过观察 1D2→3H4斯托克斯荧光光谱确定3H4的Stark分裂能级方法相比, 该过程避免了不同晶点位置中(Crystallographic site)Pr3+的 1D2能级间的能量转移影响, 从而具有较高的确定性. 同时, 我们观察了反斯托克斯荧光的时间特性.
运用密度矩阵方程，从理论上研究了Pr^3＋：LaF3晶体中λ-型三能级系统，对探测光的电磁感应透明吸收和色散特性．讨论了探测光吸收及色散与光学耦合场拉比频率强度，探测光吸收与光学耦合场失谐量之间的依赖关系．理论研究结果表明，电磁感应透明（EIT）受光学耦合场的调制，并且其中心透过效率随光学耦合场拉比频率强度的增强而增大；电磁感应透明窗口位置受光学耦合场失谐量的影响．同时，也讨论了色散随耦合光场拉比频率强度的变化规律．
In the Pr3+ -doped Y2SiO5, the population in 1D2 of Pr3+ can be transferred to 3P0 state via non-radiative energy transfer by the laser excitation in resonance with 3H4-->1D2 , and we can experimentally study the Stark splitting of 3H4 energy level via 3P0 -->3H4 anti-Stokes emission spectra. Because the anti-Stokes emission spectra can avoid the energy transfer between different crystallographic site 1D2 energy levels, the above splitting lines attribution is more accurate than the assignment via 1D2-->3H4 Stokes spectra by the laser excitation in resonance with 3H4-->1D2. In addition, the character of the anti-Stokes fluorescence decay time was observed.
In the Pr(superscript 3+) -doped Y2SiO5, the population in 1D2 of Pr(superscript 3+) can be transferred to 3P0 state via non-radiative energy transfer by the laser excitation in resonance with 3H4→1D2, and we can experimentally study the Stark splitting of 3H4 energy level via 3P0→3H4 anti-Stokes emission spectra. Because the anti-Stokes emission spectra can avoid the energy transfer between different crystallographic site 1D2 energy levels, the above splitting lines attribution is more accurate than the assignment via 1D2→3H4 Stokes spectra by the laser excitation in resonance with 3H4. In addition, the character of the anti-Stokes fluorescence decay time was observed.
Emission spectra of the 3P0 → 3H4 transition in Pr: β" alumina single crystals excited by both a broad-band blue source and by dye laser excitation at various wavelengths within the inhomogeneously-broadened 3H4 → 3P0 absorption line are considered. These spectra are strongly polarized, and are therefore due to Pr3+ ions in the Beevers-Ross (BR) sites. An approximately-axial model for the crystal field at a BR site predicts crystal field splitting of the 3H4 level and polarization selection rules which approximately match those we have observed.