Growth and Spectroscopic Characteristics of Yb3＋：LiGd（WO4）2 Crystal

• 作者: HUANG Xin-Yang WANG Guo-Fu
• 来源期刊: 结构化学
• 学科: 工学
• 关键词: 晶体 光谱特性 生长 镱 纳米线宽 发射截面 荧光动力学 合作上转换
• 年，卷（期）: 2012,（6）
• 页码范围: 809-820
• 页数: 12页
• 分类号: O734.1|TN244
• 语种: 英文

摘要

The Yb3＋：LiGd（WO4）2 crystal with the dimension of Ф15×35 mm3 was grown by Czochralski technique. The spectroscopic characterization and fluorescence dynamics of Yb3＋ in yb3＋：LiGd（WO4）2 crystal were investigated. The yb3＋：LiGd（WO4）2 crystal exhibits a broad absorption band centered near 975 nm with the linewidths of 16 and 11 nm and maximal absorption cross-section of 3.60 × 10-20 and 2.90× 10-20 cm2 for π- and σ-polarization, respectively. The emission broadband has an FWHM of 47 and 45 nm with the emission cross sections of 3.92 × 10-20 and 3.34× 10-2o cm2 at 1020 nm for re- and or-polarization, respectively. The measured fluorescence lifetime is 398 gs. The blue light emission around 480 nm through cooperative upconversion from the de-excitation of excited Yb3＋-Yb3＋ pairs at 4 K was observed under 932-nm excitation and demonstrated.