Boldyrev Kirill N, Malkin Boris Z, Popova Marina N
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, 108840, Russia.
Kazan Federal University, Kazan, 420008, Russia.
Light Sci Appl. 2022 Aug 2;11(1):245. doi: 10.1038/s41377-022-00933-2.
Resolved hyperfine structure and narrow inhomogeneously broadened lines in the optical spectra of a rare-earth-doped crystal are favorable for the implementation of various sensors. Here, a well-resolved hyperfine structure in the photoluminescence spectra of LiYF:Ho single crystals and the anticrossings of hyperfine levels in a magnetic field are demonstrated using a self-made setup based on a Bruker 125HR high-resolution Fourier spectrometer. This is the first observation of the resolved hyperfine structure and anticrossing hyperfine levels in the luminescence spectra of a crystal. The narrowest spectral linewidth is only 0.0022 cm. This fact together with a large value of the magnetic g factor of several crystal-field states creates prerequisites for developing magnetic field sensors, which can be in demand in modern quantum information technology devices operating at low temperatures. Very small random lattice strains characterizing the quality of a crystal can be detected using anticrossing points.
稀土掺杂晶体光谱中分辨出的超精细结构和狭窄的非均匀展宽谱线有利于各种传感器的实现。在此，使用基于布鲁克125HR高分辨率傅里叶光谱仪自制的装置，展示了LiYF:Ho单晶光致发光光谱中分辨良好的超精细结构以及磁场中超精细能级的反交叉。这是首次在晶体发光光谱中观察到分辨出的超精细结构和反交叉超精细能级。最窄的谱线宽度仅为0.0022厘米。这一事实与几个晶场态的大磁g因子值一起为开发磁场传感器创造了前提条件，这在低温下运行的现代量子信息技术设备中可能会有需求。利用反交叉点可以检测表征晶体质量的非常小的随机晶格应变。
