Light-induced Properties of Doped Bi4Ge3O 12 Single Crystals

Vera Marinova*, Shiuan-Huei Lin, Marin Gospodinov, Ken-Yuh Hsu

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


Optically homogeneous bismuth germanate Bi4Ge3O 12 single crystals doped with vanadium, cobalt and vanadium plus cobalt have been successfully grown by Czohralski technique with automatically diameter-weight control. The distribution coefficients for individual doping elements are determined. The effect of doping on the light-induced properties of BGO single crystals is studied. Optical absorption spectrum of annealed samples can be strongly modified under ultraviolet illumination. The photochromic effect is optically or thermally reversible from one state to another. Volt-amper charactersitcs show linear behavour and dark conductivity values are σ ∼ 10-13 (Ω.cm) -13. Holographic grating were successfully recorded in all investigated doped crystals at 514 nm.

Original languageEnglish
Pages (from-to)7-13
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1 Dec 2003
EventPhotorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IX - San Diego, CA, United States
Duration: 3 Aug 20034 Aug 2003


  • Doped crystals
  • Optical properties
  • Photochromic effect
  • Photorefractive effect


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