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Two‐Dimensional Mapping of Er 3+ Photoluminescence in CaF 2 Crystal Lines Patterned by Lasers in Oxyfluoride Glass
Author(s) -
Kanno Masaki,
Honma Tsuyoshi,
Komatsu Takayuki
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03010.x
Subject(s) - photoluminescence , materials science , laser , nanocrystal , ion , irradiation , crystal (programming language) , crystallization , doping , luminescence , analytical chemistry (journal) , optoelectronics , optics , nanotechnology , chemistry , physics , organic chemistry , chromatography , computer science , nuclear physics , programming language
The laser‐induced crystallization method is applied to an oxyfluoride glass with the composition of 41.5SiO 2 –21.3Al 2 O 3 –4.8CaO–12.6NaF–16.4CaF 2 –2.9NiO–0.5ErF 3 (mol%), and the lines consisting of CaF 2 nanocrystals (diameter: ∼20 nm) are patterned on the glass surface. It is found from micro‐photoluminescence (PL) spectra of Er 3+ ions that Er 3+ ions are incorporated into CaF 2 nanocrystals formed by laser (continuous‐wave Yb:YVO 4 fiber laser with a wavelength of 1080 nm) irradiations. Two‐dimensional mappings of the PL intensity for the 4 S 3/2 → 4 I 15/2 transition of Er 3+ ions are measured for the surface and cross section of the patterned lines. It is found that two phases giving different PL intensities are formed in the laser‐irradiated region, suggesting that the center part of the laser‐irradiated region consists of Er 3+ ‐doped CaF 2 nanocrystals and the surrounding of the center part gives the fluoride ion rich coordination state for Er 3+ ions. The formation mechanism of Er 3+ ‐doped CaF 2 nanocrystals is related to the temperature distribution of the laser‐irradiated region.