Visible to near infrared conversion in Ce{sup 3+}-Yb{sup 3+} Co-doped YAG ceramics

Journal Article · Sat Aug 15 00:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3194310· OSTI ID:21361771

Ueda, Jumpei; Tanabe, Setsuhisa ^[1]

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1. Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho Sakyo-ku, Kyoto 606-8501 (Japan)

In Ce{sup 3+}-Yb{sup 3+} co-doped Y{sub 3}Al{sub 5}O{sub 12} (YAG) ceramics, possibility of quantum cutting mechanism converting one visible photon into two NIR photons with optimum quantum efficiency approaching 200% have been investigated. In this material, Yb{sup 3+} emissions due to the {sup 2}F{sub 5/2}-{sup 2}F{sub 7/2} in the range of 1 mum were observed upon the excitation of 5d level of Ce{sup 3+}. In addition, excitation spectra of Yb{sup 3+} emission corresponded to that of Ce{sup 3+} emission completely. Lifetime of the 5d level of Ce{sup 3+} decreased with increasing Yb{sup 3+} content. These results indicate the energy transfer (ET) from the 5d levels of Ce{sup 3+} to the {sup 5}F{sub 5/2} level of Yb{sup 3+}. In (Y{sub 0.945}Ce{sub 0.005}Yb{sub 0.05}) {sub 3}Al{sub 5}O{sub 12} sample, the directly measured quantum yield (QY) of Yb{sup 3+} emission upon the excitation of 5d level of Ce{sup 3+} was about 12% and lower than QY (96%) that estimated from the ET efficiency which was calculated with the measured lifetime of Ce{sup 3+}.

• OSTI ID: 21361771
• Journal Information: Journal of Applied Physics, Vol. 106, Issue 4; Other Information: DOI: 10.1063/1.3194310; (c) 2009 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINATES
CERAMICS
CERIUM IONS
DOPED MATERIALS
ENERGY TRANSFER
LIFETIME
NEODYMIUM LASERS
PHOTOLUMINESCENCE
PHOTONS
QUANTUM EFFICIENCY
YTTERBIUM IONS
YTTRIUM COMPOUNDS
ALUMINIUM COMPOUNDS
BOSONS
CHARGED PARTICLES
EFFICIENCY
ELEMENTARY PARTICLES
EMISSION
IONS
LASERS
LUMINESCENCE
MASSLESS PARTICLES
MATERIALS
OXYGEN COMPOUNDS
PHOTON EMISSION
SOLID STATE LASERS
TRANSITION ELEMENT COMPOUNDS