Electron trapping by self-trapped hole pairs and small rare-earth clusters in Sm-doped CaF2

Academic Article

Abstract

  • In this paper we investigate the mechanisms for electron trapping, following photoionization of Sm2+ in γ- and non-γ-irradiated samples of Sm-doped CaF2. Using linear absorption, fluorescence and site-selective coherent anti-Stokes Raman excitation spectroscopy, we show that the electron traps in non-γ-irradiated CaF2 : Sm are small clusters of trivalent Sm ions. In the γ-irradiated samples, we observe the formation of self-trapped holes after photoionization, which provides us with additional evidence for the existence of self-trapped hole pairs in γ-irradiated rare-earth-doped CaF2. © 1998 Elsevier Science B.V. All rights reserved.
  • Published In

    Digital Object Identifier (doi)

    Author List

  • Beck W; Fedorov VV; Ricard D; Flytzanis C; Basiev TT
  • Start Page

  • 241
  • End Page

  • 248
  • Volume

  • 79
  • Issue

  • 4