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Up‐conversion mechanisms in Er 3+ doped YbAG crystals
Author(s) -
Kaczkan Marcin,
Borowska Maja,
Malinowski Michał,
Łukasiewicz Tadeusz,
Kołodziejak Katarzyna
Publication year - 2009
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200844428
Subject(s) - excited state , ion , ytterbium , atomic physics , erbium , absorption spectroscopy , doping , excitation , emission spectrum , luminescence , absorption (acoustics) , analytical chemistry (journal) , spectral line , photon upconversion , wavelength , chemistry , materials science , physics , optics , optoelectronics , organic chemistry , quantum mechanics , astronomy , chromatography , composite material
Up‐conversion phenomena leading to the red, green and violet emissions in erbium doped ytterbium‐aluminum garnet (YbAG) are investigated. Absorption and emission spectra and luminescence dynamics from various excited states of YbAG:Er 3+ were registered. The low temperature absorption spectra were used to determine Stark levels energies of Er 3+ ion in the investigated host. Emissions from the high lying excited states 2 G 9/2 , 4 S 3/2 and 4 F 9/2 of Er 3+ were characterized under pulsed multi‐photon IR excitation in the region of wavelength corresponding to the strong 2 F 7/2 → 2 F 5/2 absorption transition of Yb 3+ ions. Using the rate equations formalism the dynamics of the observed emissions were modeled. From the comparison of the measured and calculated decays the energy transfer rates between Yb 3+ and Er 3+ ions were evaluated. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)