A quantum electrodynamical theory of three-center energy transfer for upconversion and downconversion in rare earth doped materials
2001 ◽
Vol 114
(3)
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pp. 1089-1100
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1981 ◽
Vol 24-25
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pp. 633-636
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2019 ◽
Vol 7
(23)
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pp. 1901098
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2011 ◽
Vol 131
(3)
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pp. 353-361
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