Optical spectra of Eu2+ ion doped KMgF3 single crystals grown by Bridgman method

• Published in: Optoelectronics letters Vol. 15; no. 1; pp. 26 - 30
• Main Authors: Shi, Xu-dong, Xia, Hai-ping, Hu, Jian-xu, Zhang, Jian-li, Zhu, Yong-sheng, Chen, Bao-jiu
• Format: Journal Article
• Language: English
• Published: Tianjin Tianjin University of Technology 2019; Springer Nature B.V
• Subjects: Bridgman method; Crystal growth; Europium; Fluorescence; Lasers; Optical Devices; Optical properties; Optics; Optoelectronics Letters; Photoluminescence; Photonics; Physics; Physics and Astronomy; Single crystals; X-ray diffraction; A
• ISSN: 1673-1905; 1993-5013
• DOI: 10.1007/s11801-019-8100-y

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 6 5d 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.