Excited state relaxation dynamics and up-conversion phenomena in Gd3(Al,Ga)5O12 single crystals co-doped with erbium and ytterbium
PBN-AR
Instytucja
Instytut Fizyki Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
JOURNAL OF LUMINESCENCE
ISSN
0022-2313
EISSN
Wydawca
ELSEVIER SCIENCE BV
DOI
URL
Rok publikacji
2016
Numer zeszytu
Strony od-do
219–227
Numer tomu
177
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
Garnet crystals Erbium-doped crystals Up-conversion phenomena
Streszczenia
Język
en
Treść
Single crystals of Gd3(Al,Ga)5O12 (GAGG) doped with Er3+ or Yb3+ ions and co-doped with Er3+ and Yb3+ ions were grown successfully by the Czochralski technique. Their optical properties were investigated in detail. Rates of radiative transitions, branching ratio values and radiative lifetimes for excited multiplets of incorporated Er3+ were determined based on the Judd–Ofelt treatment of optical absorption spectra recorded at room temperature. Obtained parameters Ωt (t=2, 4, and 6) are 1.47×10−20 cm2, 1.38×10−20 cm2, and 1.19×10−20 cm2 respectively. Low energy crystal levels of Er3+ in GAGG were determined employing absorption and luminescence spectra recorded at 5 K. Consequently, the energy diagram constructed was used to substantial discussion of obtained experimental data. Up-conversion of infrared radiation at 980 nm into visible emission in crystals co-doped with erbium and ytterbium was observed and discussed. It was concluded that gathered spectroscopic data point at the potential of the GAGG:Yb3+, Er3+ system for application as a laser active material operating around 1500 nm within the 4I13/2→4I15/2 transition of Er3+.
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Original article
Original article presents the results of original research or experiment.
Inne
System-identifier
PBN-R:731083
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