fig2
Figure 2. (A) Photographs and (B) optical transmittance spectra of the xSm transparent ceramics with a thickness of ~0.3 mm. (C) The optical transmittance spectra and photoluminescence excitation spectra monitored at 597 nm of the 1.0 Sm ceramic. (D) The photoluminescence emission spectra excitation at 407 nm of the xSm ceramics. (E) The schematic energy level diagram of Sm3+. (F) The plots of (hv)2 versus hv of the xSm transparent ceramics.
