Journal
JOURNAL OF LUMINESCENCE
Volume 249, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2022.119049
Keywords
Chalcogenides; Glass-ceramic; Mid-infrared; Luminescence
Categories
Funding
- National Natural Science Foundation of China [62105168, 62122039]
- Zhejiang Provincial Natural Science Foundation of China [LR21E020001]
- Ningbo Natural Science Foundation [20211ZDYF020195, 202003N4008]
- Open Fund of the Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques
- Open Fund of the State Key Laboratory of Luminescent Materials and Devices (South China University of Technology)
- K. C. Wong Magna Fund in Ningbo University
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In this study, enhanced mid-infrared (MIR) emission was achieved in Pr3+-doped chalcogenide glass ceramics (ChGCs). By controlling the heat treatment process, biphasic-phase nanocrystals were successfully precipitated in the glass host, leading to a significant increase in the emission intensity. The obtained ChGC exhibited large stimulated emission cross sections, making it a promising candidate for MIR laser applications.
Mid-infrared (MIR) laser operating at 2-5 mu m has gained increasing interest because of the extensive applications in fields from biomedicine, sensing to nanomaterial science. Chalcogenide glass (ChG) is a kind of matrix that is promising for MIR laser due to its low phonon energy and wide infrared transmittance region. However, sig-nificant challenges in the enhancement of MIR optical properties of rare-earth ion-doped ChGs still exist. Here, enhanced MIR emission was realized in Pr3+-doped chalcogenide glass ceramics (ChGCs). By controlling the heat treatment temperature and duration, biphasic-phase nanocrystals of Ga2Se3 and GeSe(2 )were successively precipitated in the glass host. Compared to the as-prepared glass, the GCs exhibit an obvious increase in emission intensity by more than 5 times. The improvement of the MIR emission may be induced by the enhanced cross -relaxation between Pr(3+ )ions and the increased multiple scattering effects. Furthermore, the obtained ChGC enables large stimulated emission cross section 0.42 x 10(-20) cm(2 )at 2.44 mu m and 0.62 x 10(-20 )cm(2) at 4.75 mu m. The superior optical properties of the ChGC indicate that it is an attractive candidate for MIR laser.
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