Photoluminescence studies on energy transfer processes in cerium-doped Gd3Al2Ga3O12 crystals

M. Kitaura, A. Sato, K. Kamada, S. Kurosawa, A. Ohnishi, M. Sasaki, K. Hara

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We have measured photoluminescence properties of cerium-doped Gd3Al2Ga3O12 (Ce:GAGG) crystals at low temperatures with use of synchrotron radiation. Excitation spectra for the Ce3+ 5d-4f emission exhibit prominent peaks at Gd3+ intra-4f absorption bands. The Gd3+ intra-4f emission band is observed at 3.91 eV, but is not in resonance with the lowest energy Gd3+ intra-4f absorption band at 3.95 eV. The temperature dependence of the Gd3+ emission intensity is not correlated with that of the Ce3+ emission intensity. Decay curves of the Ce3+ emission were also measured at 9 K under excitation at various photon energies. The decay curve is remarkably changed, depending on the excitation photon energies. The present results give us hints to understand the whole of energy transfer processes in Ce:GAGG crystals.

Original languageEnglish
Pages (from-to)45-48
Number of pages4
JournalOptical Materials
Volume41
DOIs
Publication statusPublished - 2015 Mar 1

Keywords

  • Ce:GAGG
  • Energy transfer
  • Host sensitization
  • Photoluminescence
  • Scintillator
  • Synchrotron radiation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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