Spectroscopic investigation of 2.02 {mu}m emission in Ho{sup 3+}/Tm{sup 3+} codoped transparent glass ceramic containing CaF{sub 2} nanocrystals

Journal Article · Sat May 15 04:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3408661· OSTI ID:21476182

Chen, Q J; Zhang, W J; Qian, Q; Yang, Z M; Zhang, Q Y ^[1]

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1. MOE Key Lab of Specially Functional Materials and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641 (China)

Tm{sup 3+} and Ho{sup 3+} codoped transparent glass ceramic (GC) containing CaF{sub 2} nanocrystals were fabricated by melt-quenching and subsequent thermal treatment. X-ray diffraction and transmission electron microscopy analysis confirmed the precipitation of CaF{sub 2} nanocrystals among the glass matrix. Energy-dispersive x-ray spectroscopy results evidenced the incorporation of Tm{sup 3+} and Ho{sup 3+} into the CaF{sub 2} nanocrystals. Judd-Ofelt parameters were calculated based on the absorption spectra, the smaller {Omega}{sub 2} and larger {Omega}{sub 6} imply that Tm{sup 3+} and Ho{sup 3+} ions has entered into a symmetrical ionic crystal field. 2.02 {mu}m emission spectral of the GC samples were recorded at room temperature with an excitation of 808 nm laser diode. The enhancement of the emission at 2.02 {mu}m in the GC samples could be attributed to more efficient cross relaxation process of Tm{sup 3+}:{sup 3}H{sub 4+}Tm{sup 3+}:{sup 3}H{sub 6}{yields}{sup 2}Tm{sup 3+}:{sup 3}H{sub 4}, and energy transfer from Tm{sup 3+} to Ho{sup 3+} benefited from the incorporation of rare earth ions into CaF{sub 2} nanocrystals.

• OSTI ID: 21476182
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 9 Vol. 107; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION SPECTRA
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CERAMICS
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
ELECTRON MICROSCOPY
EMISSION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUORESCENCE
FLUORIDES
FLUORINE COMPOUNDS
GLASS
HALIDES
HALOGEN COMPOUNDS
HEAT TREATMENTS
HOLMIUM IONS
IONIC CRYSTALS
IONS
LUMINESCENCE
MATERIALS
MATRIX MATERIALS
MICROSCOPY
NANOSTRUCTURES
PHOTOLUMINESCENCE
PHOTON EMISSION
PRECIPITATION
RELAXATION
SCATTERING
SEPARATION PROCESSES
SPECTRA
SPECTROSCOPY
THULIUM IONS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY