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Spectral Hole-burning Properties of LiGa5O8:Co2+Nanocrystallites

Authors
Journal
Physics Procedia
1875-3892
Publisher
Elsevier
Publication Date
Volume
3
Issue
4
Identifiers
DOI: 10.1016/j.phpro.2010.01.219
Keywords
  • Persistent Spectral Hole-Burning
  • Nanocrystallites
  • Transition Metal Ions

Abstract

Abstract Properties of persistent spectral holes in the 4 A 2 ( F ) ← 4 T 1 ( P ) transition in nanocrystalline (20–100 nm) powders and in single crystals of LiGa 5O 8:Co 2+ have been investigated. It appears that for the investigated samples, the hole-burning efficiency is higher and spectral diffusion more pronounced in the nanocrystalline sample. Holes can efficiently be erased by exposure to 532 nm light but the 4 A 2 ( F ) ← 4 T 1 ( P ) luminescence appears to be stable when excited at this wavelength. Results indicate that the holeburning mechanism is based on the presence of Co 3+ ions which act as electron traps upon selective photoionization of the Co 2+ ions.

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