Journal
OPTICAL MATERIALS
Volume 119, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2021.111322
Keywords
Broadband spectral properties; Cubic and square antiprism sublattice clusters; Local structures modulation
Categories
Funding
- National Natural Science Foundation of China [61905289, 61925508, 61935010, 51972149]
- Key-Area Research and Development Program of Guangdong Province [2020B090922006]
- Guangzhou Science and Technology Project [201903010042, 201904010294, 20190401385]
- Science and Technology Commission of Shanghai Municipality [20511107400]
- CAS Interdisciplinary Innovation Team [JCTD-2019-12]
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By modulating the spectral properties of neodymium-doped fluorite crystal, tunable broadband photoluminescence has been successfully achieved in this study, providing a promising direction for the generation of ultrashort pulses in rare-earth-doped fluoride crystals.
The lanthanide-doped materials have been widely used. The well shielded f orbitals make the f-f transitions be sharp lines and non-tunable which are hurdles to the generation of ultrashort lasers. In the work, the spectral properties of neodymium-doped fluorite crystal are modulated to be varied significantly with the compositions of the crystal. The first principles calculation is combined and the results show that there exist two types of centers of cubic and square antiprism sublattice clusters. The concentrations of the centers could be tuned in large scale by adjusting the compositions of the host. Then tunable broadband photoluminescence is obtained which is promising for the generation of ultrashort pulses. The designing of new ultrafast laser materials is highly expected in the rare-earth-doped fluoride crystals.
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