Light-induced and holographic properties of ruthenium and manganese co-doped Bi4Ge3O12 crystals

Shiuan-Huei Lin, V. Marinova, Y. C. Lin, D. Petrova, Wu-Ching Chou, Ken-Yuh Hsu

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of Ru + Mn co-doping on the light-induced properties of Bi 4Ge3O12 (BGO) crystals is studied and compared with single Ru-and Mn-doped crystals. Optical absorption spectra of Ru + Mn co-doped crystal demonstrates a photosensitivity shift to the visible spectral range. In addition, a strong photochromic effect, being fully reversible by thermal annealing is observed. It is verified by photoluminescence emission that charge traps could be manipulated under ultraviolet (UV) excitation, as the photoluminescence intensity decreases revealing the existence of the state filling effect. Ru + Mn doping leads to a faster response time during holographic recording at 633nm and a prolonged read-out process, especially after a preliminary exposure to UV light. The ability to modify the defect structure and corresponding absorption bands suggests the future potential for optical fixing using a two-step sensitization method.

Original languageEnglish
Article number075601
JournalJournal of Optics
Volume12
Issue number7
DOIs
StatePublished - 16 Jul 2010

Keywords

  • dark conductivity
  • holography
  • optical properties
  • photochromic effect
  • photoluminescence

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