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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 15, Iss. 7 — Jul. 1, 1998
  • pp: 1850–1855

Light-induced absorption and properties of shallow impurity levels in undoped and Ce-doped BaTiO 3

Hongwei Song, S. X. Dou, Mingjun Chi, Hong Gao, Yong Zhu, and Peixian Ye  »View Author Affiliations


JOSA B, Vol. 15, Issue 7, pp. 1850-1855 (1998)
http://dx.doi.org/10.1364/JOSAB.15.001850


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Abstract

Spectral and temporal characteristics of light-induced absorption for BaTiO 3 crystals undoped and doped with various amounts of Ce were investigated and compared. Dark decay of light-induced absorption with two time constants corresponding to two shallow levels was observed in all crystals investigated. Light-induced absorption spectra were then resolved into two components, slow and fast, according to the dark-decay time constants. The resolved spectra reveal that in all the undoped and Ce-doped crystals the two shallow levels have the same defect origins, independently of doping. The thermal activation energies of the two shallow levels were deduced to be 0.7 and 0.5 eV in all crystals, and the 0.7-eV shallow level is attributed to Fe 4+/5+ . Some other important parameters for the two shallow levels were also determined. 1998 Optical Society of America S0740-3224(98)02907-5

[Optical Society of America ]

OCIS Codes
(160.2260) Materials : Ferroelectrics
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics

Citation
Hongwei Song, S. X. Dou, Mingjun Chi, Hong Gao, Yong Zhu, and Peixian Ye, "Light-induced absorption and properties of shallow impurity levels in undoped and Ce-doped BaTiO 3," J. Opt. Soc. Am. B 15, 1850-1855 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-7-1850


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