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Excited state relaxation dynamics and up-conversion phenomena in Gd 3 (Al,Ga) 5 O 12 single crystals co-doped with erbium and ytterbium
- Source :
- Journal of Luminescence. 177:219-227
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- 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+.
- Subjects :
- Ytterbium
Materials science
Infrared
Biophysics
Analytical chemistry
chemistry.chemical_element
Mineralogy
02 engineering and technology
01 natural sciences
Biochemistry
law.invention
Crystal
Erbium
law
0103 physical sciences
Radiative transfer
Absorption (electromagnetic radiation)
010302 applied physics
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Laser
Atomic and Molecular Physics, and Optics
chemistry
Excited state
0210 nano-technology
Subjects
Details
- ISSN :
- 00222313
- Volume :
- 177
- Database :
- OpenAIRE
- Journal :
- Journal of Luminescence
- Accession number :
- edsair.doi...........0d16058d4e1d4a5d788e8bf99661f68e