Temperature dependence of Charge Transfer Luminescence in Yb3+:YAG single crystal

• Published in: Optical materials. X 2024-05, Vol.22, p.100315, Article 100315
• Main Authors: Padrez, Yaraslau, Boiko, Vitalii, Kajan, Juraj, Gregor, Tomáš, Tinkova, Vira, Karpicz, Renata, Chaika, Mykhailo
• Format: Article
• Language: English
• Subjects: Charge transfer; Energy transfer; Single crystal; Temperature dependence; YAG; Yb3
• ISSN: 2590-1478; 2590-1478
• DOI: 10.1016/j.omx.2024.100315

Charge Transfer Luminescence (CTL) processes play a major roles in Yb:YAG laser materials act as a source of energy losses decrease the performance of this material. In this work, the temperature dependence of CTL in Yb:YAG single crystal was investigated. A 375-nm picosecond laser source was used as the excitation source. It was shown that the change in temperature affects the emission intensity and the position maximum of CTL occurring between perturbated F+ centers and Yb3+ ions. The increase in the temperature caused the blueshift of CTL, while the emission intensity have the inverted U-shape. The measured luminescence lifetime of CLT was in the range of 8 ns – 13 ns and barely changes with temperature. The temperature dependence of the CTL parameters was explained by the change in the energy transfer processes between F+ centers and the charge transfer state of Yb:YAG single crystals. •Temperature dependence of CTL of Yb:YAG single crystal was investigated.•CTL band emission intensity is inverted U-shaped.•Three different regions of the CTL parameters are set depending on the temperature.•The temperature dependence of CTL is explained by the change of energy transfer processes between F+ centers and CTS.