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Conduction band states and the 5d-4f laser transition of rare earth ion dopants

机译:稀土离子掺杂剂的导带状态和5d-4f激光跃迁

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Abstract: We discuss how the interactions of the 5d orbital with the conduction band of the host medium play a crucial role in determining whether rare earth containing materials can serve as useful laser materials, based on their 5d-4f transition. To explore this issue, we examine the pump-probe spectra of Sm$+2$PLU$/, Eu$+2$PLU$/, and Ce$+3$PLU$/ dopants in various fluoride and chloride crystals. In addition we suggest that the luminescence properties are also profoundly impacted by this interaction. The outstanding UV laser performance achieved by the Ce:LiSrAlF$-6$/ crystal is rationalized in terms of the reduced overlap of conduction band states with the cerium ions. !11
机译:摘要:我们讨论了5d轨道与宿主介质的导带的相互作用如何在确定含稀土材料是否可以用作有用的激光材料(基于其5d-4f跃迁)方面发挥关键作用。为了探究这个问题,我们研究了氟化物和氯化物晶体中Sm $ + 2 $ PLU $ /,Eu $ + 2 $ PLU $ /和Ce $ + 3 $ PLU $ /掺杂物的泵浦探针光谱。此外,我们认为这种相互作用也对发光性能产生了深远的影响。 Ce:LiSrAlF $ -6 $ /晶体实现的出色的紫外线激光性能可以通过减少导带态与铈离子的重叠来实现。 !11

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