We have investigated the oscillatory behavior of diffraction efficiency under ultraviolet-light-recoring experimentally and theoretically. We utilized a model in which electrons and holes can be excited from impurity centers in the ultraviolet region to study the oscillatory behavior of the diffraction efficiency. On the basis of the material equations and the coupled-wave equations, we found that the oscillating behavior is due to the oscillation of the relative spatial shift, not the large space-charge field. And the electron-hole competition may cause the oscillating behavior of spatial phase shift ? and the reduction of space-charge field Esc.
© 2005 Optical Society of America
(090.2900) Holography : Optical storage materials
(160.3730) Materials : Lithium niobate
(160.5320) Materials : Photorefractive materials
(210.2860) Optical data storage : Holographic and volume memories
R. Zhu, D. 'a. Liu, Z. Luan, Y. Zhou, and L. Liu, "Study of oscillatory behavior of recording process arising from electron-hole competition in strong oxidized LiNbO3:Fe:Mn," in Photorefractive Effects, Materials, and Devices, G. Zhang, D. Kip, D. Nolte, and J. Xu, eds., Vol. 99 of OSA Trends in Optics and Photonics (Optical Society of America, 2005), paper 417.
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