Liquid Phase Epitaxy growth of Tm3+-doped CaF2 thin-films based on LiF solvent

JOURNAL OF ALLOYS AND COMPOUNDS

卷:803

Article

Brasse, Gurvan¹  Loiko, Pavel¹  Grygiel, Clara¹  Leprince, Philippe¹  Benayad, Abdelmjid¹  Lemarie, Franck¹  Doualan, Jean-Louis¹  Braud, Alain¹  Camy, Patrice¹ 

[1] Normandie Univ, UMR 6252, Ctr Rech Ions Mate Riaux & Photon CIMAP, ENSICAEN,UNICAEN,CEA,CNRS, F-14000 Caen, France

关键词: Liquid phase epitaxy;    Calcium fluoride;    Thin films;    Thulium ions;    Luminescence;   

DOI  :  10.1016/j.jallcom.2019.06.288

来源: Elsevier

【 摘 要 】

Single-crystalline Tm3+-doped calcium fluoride (Tm3+:CaF2) films were grown onto (100) oriented undoped bulk CaF(2 )substrates by Liquid Phase Epitaxy method using LiF as a solvent. The growth was performed at the temperatures of 853-865 degrees C. Crack-free transparent films with a high doping concentration of similar to 6 at.% and a thickness up to similar to 100 mu m were obtained. The film structure and morphology were characterized by confocal microscopy, X-ray diffraction and scanning electron microscopy. High resolution X-ray diffraction and reciprocal space mapping confirmed the high crystallinity and the low mosaicity of the films. Energy-Dispersive X-ray spectroscopy revealed a uniform distribution of Tm3+ ions in the films. The Tm3+:CaF2 films exhibit a broadband emission at similar to 2 mu m and are of interest for waveguide lasers. The use of CaF2-LiF binary system is also promising for fabrication of other rare-earthdoped CaF2 layers. (C) 2019 Elsevier B.V. All rights reserved.

【 授权许可】

Free