High-quality KMgF_3 single crystal containing 0.5 mol% europium (Eu) was prepared by an improved Bridgman method.X-ray diffraction(XRD),photoluminescence spectra and fluorescence lifetime were measured.The results ind...High-quality KMgF_3 single crystal containing 0.5 mol% europium (Eu) was prepared by an improved Bridgman method.X-ray diffraction(XRD),photoluminescence spectra and fluorescence lifetime were measured.The results indicate the reduction of Eu^(3+)to Eu^(2+)in the KMgF_3 single crystal.Under the excitation of 259 nm,370 nm and 394 nm,the sample has two distinct emissions of Eu^(2+):4f^7→4f^7(～363 nm)and 4f^65d^1→4f^7(～440 nm).The substitution site for Eu ion is confirmed.The optical property investigation result shows that the Eu^(2+)doped KMgF_3 single crystal may be used as potential laser media and related materials for optical devices.展开更多
基金supported by the National Natural Science Foundation of China(Nos.51772159,51472125,11504188 and U1504626)the Natural Science Foundation of Zhejiang Province(No.LZ17E020001)K.C.Wong Magna Fund in Ningbo University
文摘High-quality KMgF_3 single crystal containing 0.5 mol% europium (Eu) was prepared by an improved Bridgman method.X-ray diffraction(XRD),photoluminescence spectra and fluorescence lifetime were measured.The results indicate the reduction of Eu^(3+)to Eu^(2+)in the KMgF_3 single crystal.Under the excitation of 259 nm,370 nm and 394 nm,the sample has two distinct emissions of Eu^(2+):4f^7→4f^7(～363 nm)and 4f^65d^1→4f^7(～440 nm).The substitution site for Eu ion is confirmed.The optical property investigation result shows that the Eu^(2+)doped KMgF_3 single crystal may be used as potential laser media and related materials for optical devices.
