http://hdl.handle.net/20.500.12128/20343
Tytuł: | Broadband near-infrared luminescence in lead germanate glass triply doped with Yb3+/Er3+/Tm3+ |
Autor: | Pisarski, Wojciech A. Pisarska, Joanna Lisiecki, Radosław Ryba-Romanowski, Witold |
Słowa kluczowe: | lead germanate glasses; rare earth ions; near-infrared luminescence |
Data wydania: | 2021 |
Źródło: | "Materials" (2021), iss. 11, art. no. 2901, s. 1-10 |
Abstrakt: | This paper deals with broadband near-infrared luminescence properties of lead germanate glass triply doped with Yb3+/Er3+/Tm3+. Samples were excited at 800 nm and 975 nm. Their emission intensities and lifetimes depend significantly on Er3+ and Tm3+ concentrations. For samples excited at 800 nm, broadband emissions corresponding to the overlapped 3H4 ! 3F4 (Tm3+) and 4I13/2 ! 4I15/2 (Er3+) transitions centered at 1.45 m and 1.5 m was identified. Measurements of decay curves confirm reduction of 3H4 (Tm3+), 2F5/2 (Yb3+) and 4I13/2 (Er3+) luminescence lifetimes and the presence of energy-transfer processes. The maximal spectral bandwidth equal to 269 nm for the 3F4 ! 3H6 transition of Tm3+ suggests that our glass co-doped with Yb3+/Er3+/Tm3+ is a good candidate for broadband near-infrared emission. The energy transfer from 4I13/2 (Er3+) to 3F4 (Tm3+) and cross-relaxation processes are responsible for the enhancement of broadband luminescence near 1.8 m attributed to the 3F4 !3H6 transition of thulium ions in lead germanate glass under excitation of Yb3+ ions at 975 nm. |
URI: | http://hdl.handle.net/20.500.12128/20343 |
DOI: | 10.3390/ma14112901 |
ISSN: | 1996-1944 |
Pojawia się w kolekcji: | Artykuły (WNŚiT) |
Plik | Opis | Rozmiar | Format | |
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Pisarski_Pisarska_broadband_near_infrared.pdf | 9,55 MB | Adobe PDF | Przejrzyj / Otwórz |
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