Photochromic effects in Bi2TeO5:Cr crystals

I. Földvári, L. A. Kappers, R. H. Bartram, Á Péter

Research output: Contribution to journalArticle

10 Citations (Scopus)


Bismuth tellurite is a new non-linear optical material with interesting photorefractive properties. Chromium builds into the crystal in 6 + valence state (chromate anion). The exposure of the Cr-doped crystals with white light creates new absorption bands in the visible and near infrared range. This photochromic effect is related to a Cr6+→Cr5+ charge transfer. An appropriate thermal annealing eliminates the color restoring the Cr6+ state. The temperature and wavelength dependence of the photochromic effect has been investigated.

Original languageEnglish
Pages (from-to)47-53
Number of pages7
JournalOptical Materials
Issue number1
Publication statusPublished - Mar 1998



  • Bismuth tellurite
  • Chromium absorption
  • Photochromic effect

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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