4.6 Article

Effect of biphasic-phase on the mid-infrared emission properties of Pr3+doped GeSe2-Ga2Se3 chalcogenide glass ceramics

期刊

JOURNAL OF LUMINESCENCE
卷 249, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.jlumin.2022.119049

关键词

Chalcogenides; Glass-ceramic; Mid-infrared; Luminescence

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资金

  1. National Natural Science Foundation of China [62105168, 62122039]
  2. Zhejiang Provincial Natural Science Foundation of China [LR21E020001]
  3. Ningbo Natural Science Foundation [20211ZDYF020195, 202003N4008]
  4. Open Fund of the Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques
  5. Open Fund of the State Key Laboratory of Luminescent Materials and Devices (South China University of Technology)
  6. 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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