EPR and optical spectroscopy of Cr3+ ions in Y3Ga5O12 crystalline thin films

M. Yamaga, B. Henderson, K. P. O'Donnell, H. Takeuchi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The emission spectrum of Cr3+ in Y3Ga5O12 crystalline thin films at 10K is composed of the sharp R1-line, its phonon sideband, and the very weak broadband. The lineshape of R1-line at the peak wavelength of 689.8 nm cannot be fitted to a single Gaussian. This suggests that there exist several different Cr3+ sites in the thin film. This fact is confirmed by lifetime measurements; the radiative decay of the fluorescence is decomposed into multiple-exponential curves. The dominant component (2.8 ms) of the decay curve for the broadband emission is equal to those (2.4 ms) for R1-line and its phonon sidebands. This result is discussed in terms of a tunneling model.

Original languageEnglish
Pages (from-to)470-473
Number of pages4
JournalApplied Physics A Solids and Surfaces
Volume54
Issue number5
DOIs
Publication statusPublished - 1 May 1992

Keywords

  • crystalline thin films
  • broadband emission
  • phonon sidebands
  • fluorescence decay

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