Dephasing mechanisms of optical transitions in rare-earth-doped transparent ceramics
Dephasing mechanisms of optical transitions in rare-earth-doped transparent ceramics
复制标题
DOI：
10.1103/physrevb.94.184301
复制
发表时间：
2016-11
影响因子：
3.7
通讯作者：
N. Kunkel;J. Bartholomew;S. Welinski;A. Ferrier;A. Ikesue;P. Goldner
中科院分区：
文献类型：
--
作者：
N. Kunkel;J. Bartholomew;S. Welinski;A. Ferrier;A. Ikesue;P. Goldner
我们确定和分析退相机制，扩大随机取向的透明陶瓷中的稀土离子的光学跃迁。研究了在不同条件下制备的一系列Y_2O_3陶瓷样品中Eu^（3+）掺杂的窄F_0^7-Particip-D_0 ^5跃迁。我们表征的温度和磁场的均匀线宽的依赖性，以及长期的光谱扩散的时间尺度高达1秒。结果强调了具有不同热处理和Zr^（4+）添加剂浓度的样品之间的显着差异。特别是，观察到几个不同的磁相互作用从缺陷中心，这是明确区分的扩大，由于与两级系统和声子的相互作用。通过最小化由于不同的缺陷中心，线宽的顺序为4 kHz的所有样本实现的加宽。的线宽是有限的温度依赖性的相互作用和相互作用，这是尚未确定。虽然在这些陶瓷样品中均匀的线宽可以进一步变窄，但现在的加宽与稀土离子掺杂单晶中实现的线宽相当。因此，这项工作强调了研究陶瓷的有用性，以深入了解与单晶相关的失相机制，并表明陶瓷可能是经典和量子信息处理中应用的一个有趣的替代方案。
We identify and analyze dephasing mechanisms that broaden the optical transitions of rare-earth ions in randomly oriented transparent ceramics. The study examines the narrow F_0^7 ↔ D_0^5 transition of Eu^(3+) dopants in a series of Y_2O_3 ceramic samples prepared under varying conditions. We characterize the temperature and magnetic field dependence of the homogeneous linewidth, as well as long-term spectral diffusion on time scales up to 1 s. The results highlight significant differences between samples with differing thermal treatments and Zr^(4+) additive concentrations. In particular, several distinct magnetic interactions from defect centers are observed, which are clearly distinguished from the broadening due to interactions with two-level systems and phonons. By minimizing the broadening due to the different defect centers, linewidths of the order of 4 kHz are achieved for all samples. The linewidths are limited by temperature-dependent interactions and by an interaction that is yet to be identified. Although the homogeneous linewidth can be narrowed further in these ceramic samples, the broadening is now comparable to the linewidths achieved in rare-earth-ion–doped single crystals. Thus, this work emphasizes the usefulness of studying ceramics to gain insights into dephasing mechanisms relevant to single crystals and suggests that ceramics may be an interesting alternative for applications in classical and quantum information processing.