2.0-μm emission and energy transfer of Ho3+/Yb3+ co-doped LiYF4 single crystal excited by 980 nm<xref ref-type="fn" rid="cpb142717fn1">*</xref>

2.0-μm emission and energy transfer of Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystal excited by 980 nm*

Yang Shuo^a), Xia Hai-Ping^a)†, Jiang Yong-Zhang^a), Zhang Jia-Zhong^a), Jiang Dong-Sheng^a), Wang Cheng^a), Feng Zhi-Gang^a), Zhang Jian^a), Gu Xue-Mei^a), Zhang Jian-Li^a), Jiang Hao-Chuan^b), Chen Bao-Jiu^c)

Emission spectra of LFHY2, LFHY4, LFHY6, and LFHY8 samples. Inset shows the energy level scheme and energy transfer processes.