Three- and four-photon excited upconversion luminescence in terbium doped lutetium silicate powders by femtosecond laser irradiation
2007 ◽
Vol 442
(4-6)
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pp. 492-495
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2006 ◽
Vol 24
(6)
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pp. 754-756
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2016 ◽
Vol 14
(8)
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pp. 083201-83205
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