In this paper, the whispering gallery mode lasing from Sm 3+ doped ZnO micro-spheres operating in the visible wavelength range 550–750 nm is studied. Highly smooth and crystalline Sm 3+ :ZnO micro-spheres of various diameters were synthesized by simple laser ablation of sintered target in air. The dopant concentration has been restricted within the solid solubility limit of 1 mol%. The Sm 3+ ion substitution in ZnO matrix results in the formation of inter-band levels by the characteristic 4f level of Sm 3+ in the forbidden gap of ZnO. Thus, when the micro-spheres are excited with 488 nm, four major visible emissions associated with Sm 3+ ##IMG## [http://ej.iop.org/images/0022-3727/53/13/135302/dab5730ieqn001.gif] transitions namely, transitions from ##IMG## [http://ej.iop.org/images/0022-3727/53/13/135302/dab5730ieqn002.gif] to its low-lying multiplets of ##IMG## {...}

中文翻译：

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利用激光烧蚀技术从Sm 3+：ZnO微球实现清晰可见的WGM激光发射

在本文中，研究了在可见光波长范围550-750 nm下工作的Sm 3+掺杂的ZnO微球发出的回音壁模式。通过简单的激光烧蚀空气中烧结靶，合成了各种直径的高度光滑且结晶的Sm 3+：ZnO微球。掺杂剂浓度已被限制在1mol％的固溶度极限内。ZnO基体中的Sm 3+离子取代导致禁带中Sm 3+的特征4f能级形成带间能级。因此，当微球被488 nm激发时，与Sm 3+相关的四个主要可见光发射## IMG ## [http://ej.iop.org/images/0022-3727/53/13/135302/ dab5730ieqn001.gif]转换，即从## IMG ## [http://ej.iop.org/images/0022-3727/53/13/135302/dab5730ieqn002转换。