Green upconversion emission from Er3+ ion doped into sol-gel silica glasses under red light (647.1 nm) excitation

W. Xu, S. Dai, L. M. Toth, G. D. Del Cul, J. R. Peterson

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Abstract

Green upconversion emission from Er3+(4f11) ion doped into a sol-gel silica glass under red light (647.1 nm) excitation has been observed and characterized. Green and weak blue emission bands, centered at 550 and 410 nm, for the 4S3/24I15/2 and 2H9/24I15/2Er3+ transitions, respectively, have been observed. These upconversion processes involve a sequential two-photon absorption. A fluorescence efficiency of 1.7 × 10-6 has been estimated for the 4S3/24I15/2 (550 nm) emission in Er3+ ion at room temperature for a sample doped with 1.2 mol % Er(NO3)3. An upconversion mechanism is proposed.

Original languageEnglish
Pages (from-to)4447-4450
Number of pages4
JournalJournal of Physical Chemistry
Volume99
Issue number13
DOIs
StatePublished - 1995
Externally publishedYes

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