Lowest 4f-to-5d and Charge-Transfer Transitions of Rare-Earth Ions in LaPO4 and Related Host-Lattices

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概要

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• In order to study the high energy optical transitions i.e., 4f-to-5d (f-d) and charge-transfer (CT) spectra of trivalent rare earth (4fn-series, lanthanide) ions in crystal lattices, the luminescence excitation spectra of the series ions in LaPO4 host lattices are measured in the vacuum ultraviolet (VUV)-ultraviolet (UV) spectral region of 120–350 nm, and the CT-excitation spectra of Y2O2S and La2O2S are measured in a UV region. The f-d and CT bands are observed for the most 4fn-series ions in which the predicted transition energies are lower than the host lattice absorption edge, that is, the f-d bands for Ce3+, Pr3+, Sm3+, Tb3+ and Dy3+, and the CT band for Nd3+, Sm3+, Eu3+, Dy3+, Ho3+, Er3+, Tm3+ and Yb3+. The energies of these observed peaks of f-d and CT bands agree fairly well with the values calculated by the method proposed in our previous report. The relationship between the energies of the CT transition and the absorption edge in various host lattices is discussed.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2003-04-15

著者

• Nakazawa Eiichiro

  Department of Electronic Engineering, Kogakuin University, Nakano-machi, Hachioji, Tokyo 192-0015, Japan

• Shiga Fuminori

  NHK Science and Technical Research Laboratories, Kinuta, Setagaya-ku, Tokyo 157-8510, Japan

関連論文

• Lowest 4f-to-5d and Charge-Transfer Transitions of Rare-Earth Ions in LaPO4 and Related Host-Lattices

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