Effect of confinement on the Eu emission band D0→F0 in Eu-doped nano-glass-ceramics |
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Authors: | D. Saurel V.K. Tikhomirov K. Driesen |
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Affiliation: | a INPAC—Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Belgium b Chemistry Department, Katholieke Universiteit Leuven, Belgium |
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Abstract: | We report a non-linear blue shift of the zero-phonon emission line 5D0→7F0 of Eu3+-dopant in Eu3+-doped nano-glass-ceramics in magnetic field up to 50 T. The shift is significantly larger in nano-glass-ceramics compared to its precursor glass, suggesting that the nanoceraming of the precursor glass decreases the effective mass of the f-electrons bands of Eu3+ resulting in their enhanced magnetic confinement. Moreover, the non-linear character of the magnetic field dependence of this blue energy shift denotes a spatial confinement of f-electrons wave-functions of Eu3+ dopants in the PbF2-based nanocrystals of the nano-glass-ceramics where up to 90% of the dopants partition. The spatial confinement seems to be due to an admixture to the f-states of Eu3+ of its higher lying states of opposite parity which fall in the quantum well comprising of Eu3+-doped PbF2 crystalline nanoparticles embedded in the surrounding glass network. |
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Keywords: | Glass ceramics Nanocrystals Optical properties Magneto-optical effects Photoluminescence Confinement effect |
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