单斜晶体Y $_2$ SiO $_5$中$^{4}I_{15/2} \rightarrow $ $^{4}I_{13/2}$铒跃迁的位置选择角分辨吸收光谱的证明
Demonstration of site-selective angular-resolved absorption spectroscopy of the $^{4}I_{15/2} \rightarrow $$^{4}I_{13/2}$ erbium transition in the monoclinic crystal Y$_2$SiO$_5$
摘要：
本文研究了Y $_2$ SiO $_5$中ErPDMATHABMM跃迁$^{4}I_{15/2} \rightarrow $ $^{4}I_{13/2}$的光吸收与偏振光角的关系，从而揭示了在垂直于单斜轴b的介电平面中相关的各向异性和相关吸收主方向的取向。测量在低温下进行。这使我们能够隔离基态和激发态中的最低晶场能级。我们光谱解析和独立表征的Y $_2$ SiO $_5$矩阵中的两个钇取代位点。当只考虑所研究的电介质平面时，还不能明确地确定吸收张量分量。尽管如此，测量显着地表明，在低温下很好地解决了这种感兴趣的过渡不仅是磁偶极子允许的过渡，但实际上是一个混合的电磁过渡。
英文摘要：
We study the angular dependence in polarized light of the optical absorption for the Er$^{3+}$ transition $^{4}I_{15/2} \rightarrow $$^{4}I_{13/2}$ in Y$_2$SiO$_5$, revealing thus the associated anisotropy and the orientation of the related absorption principal directions in the dielectric plan perpendicular to the monoclinic axis b. The measurements are performed at low temperature. This allows us to isolate the lowest crystal field levels in the ground and excited states. We spectrally resolve and independently characterize the two yttrium substitution sites in the Y$_2$SiO$_5$ matrix. The absorption tensor components cannot be unambiguously determined yet while only considering the investigated dielectric plane. Still, measurements remarkably demonstrate that this transition of interest well resolved at low temperature is not only a magnetic-dipole allowed transition but indeed a hybrid electric-magnetic transition.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
