Figure 2
(a) Absorption spectra of Er3+/Yb3+single doped and co-doped Na5Lu9F32 single crystals. (b) Transmittance spectra of Er3+/Yb3+ co-doped Na5Lu9F32 single crystal.
Figure 2 | Scientific Reports
(a) Absorption spectra of Er3+/Yb3+single doped and co-doped Na5Lu9F32 single crystals. (b) Transmittance spectra of Er3+/Yb3+ co-doped Na5Lu9F32 single crystal.
