Journal
JOURNAL OF LUMINESCENCE
Volume 130, Issue 8, Pages 1546-1550Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2010.03.027
Keywords
Er:YSGG; Optical properties; Judd-Ofelt analysis; Photoluminescence
Categories
Funding
- National Natural Science Foundation of China [10804053, 60478025]
- Natural Science Foundation of the Jiangsu Higher Education institutions of China [09KJB170003]
- Foundation of Nanjing University of Information Science and Technology
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Er:YSGG single crystals with good optical quality were grown by Czochralski method. X-ray diffraction (XRD) measurements show that the crystal lattice parameters of the 30 at.% Er(3+)-doped YSGG crystal were a=b=c=12.4640 +/- 0.0065 angstrom, alpha=beta=gamma=90 degrees. The doping concentration of Er(3+) in YSGG was calculated. The absorption spectrum and photoluminescence spectra of Er:YSGG crystal were studied at room temperature. Based on Judd-Ofelt (J-O) theory, the J-O intensity parameters Omega(t) (t=2, 4, 6), the experimental and theoretical oscillator strengths were calculated using the absorption spectrum. The intensity parameters Omega(t) (t=2,4,6) obtained to be Omega(2)=0.23 x 10(-20) cm(2), Omega(4)=0.86 x 10(-20) cm(2), Omega(6)=0.37 x 10(-20) cm(2), respectively. With these intensity parameters, the line strengths, oscillator strengths, transition probabilities, fluorescence branching ratios and radiation lifetimes were calculated. The photoluminescence spectra and excitation spectrum of Er:YSGG were measured and studied. (C) 2010 Elsevier B.V. All rights reserved.
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