LAUSR

Highly transparent (Lu0.3Gd0.7)2SiO5:Y3+ (5 at%) single crystals were obtained by the laser floating zone (LFZ) technique in air at 10 mm h−1. Scanning electron microscopy (SEM/EDS) allowed observation of homogeneous crystalline fibres of B-type oxyorthosilicates with a C2/c monoclinic structure, as revealed by X-ray diffraction and Raman spectroscopy studies. Optical measurements on 0.32 mm thick samples revealed ∼86% transmission in the visible-NIR range, together with intense intra 4f7 transitions of Gd3+ ions from the 8S7/2 ground state in the UV region. Additionally, as a good indication of being a host matrix for photonic applications, a wide bandgap favouring the introduction of energy levels in the forbidden band was observed in these materials through photoluminescence (PL) and photoluminescence excitation (PLE) studies.