Optical properties of spectral hole-burning material Eu3+:Y2SiO5

摘要

In this paper, optical properties of Eu$+3$PLU$/:Y$-2$/SiO$- 5$/ have been investigated. $+7$/F$-J$/(J $EQ 0,1,2,3,4)$ARLR$+5$/D$-0,1,2$/ transitions of Eu$+3$PLU$/- doped in Y$-2$/SiO$-5$/ crystal were studied by transmission spectra, fluorescence spectra, photoluminescence excitation (or absorption) spectra and site selective fluorescence spectra. Nearly fifty Stark energy levels are recorded in our experiments. The results show that the Eu$+3$PLU$/ ions occupy two inequivalent sites whose spectral lines of $+5$/D$-0$/$ARLR$+7$/F$-0$/ transitions are about 0.2 nm from each other in Y$-2$/SiO$-5$/ crystal. By analyzing these spectra we also find that both sites are centers of low symmetry. The X-ray powder diffraction pattern of Eu$+3$PLU$/:Y$-2$/SiO$-5$/ shows that the crystal is monoclinic, and lattices constants a, b, c and $beta is obtained by a simulation with the measured diffraction angles. The lattice constants a, b, c is found slightly larger but very close to those of undoped Y$-2$/SiO$-5$/ crystal.