Direct observation of a highly forbidden optical transition in Sm:SrF2
Direct observation of a highly forbidden optical transition in Sm:SrF2
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DOI：
10.1103/physreva.100.032502
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发表时间：
2019-09
影响因子：
2.9
通讯作者：
M. Verma;Luca Talamo;Hiromitsu Sawaoka;A. Vutha
中科院分区：
文献类型：
--
作者：
M. Verma;Luca Talamo;Hiromitsu Sawaoka;A. Vutha
The $4f^6$ $^{7}F_0$ $\to 4f^6$ $^{5}D_0$ intra-configuration transition in Sm:SrF$_2$ is forbidden for Sm$^{2+}$ ions in the octahedrally symmetric substitution sites in SrF$_2$. We report the direct observation of this transition using laser-induced fluorescence at cryogenic temperatures, and measurements of the excited state lifetime and the excitation cross section. To the best of our knowledge, this optical transition has the longest lived excited state ever observed in a solid.
