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双掺杂LiNbO3:Fe:Mn全息存储动力学
引用本文:刘友文,刘立人,郭迎春,周常河.双掺杂LiNbO3:Fe:Mn全息存储动力学[J].物理学报,2000,49(5):880-886.
作者姓名:刘友文  刘立人  郭迎春  周常河
作者单位:中国科学院上海光学精密机械研究所,上海 201800
摘    要:建立了包括扩散、漂移和光伏打效应三种输运机制,小信号光强、小调制度近似下描述双掺杂LiNbO3:Fe:Mn晶体用双色光进行全息存储的动力学的耦合微分方程组,数值求解并解释了晶体光存储的时间动态发展过程.在此基础上,分析了晶体的氧化还原程度对全息存储过程的影响,只有在晶体总的受主数密度Na(即Fe3+和Mn3+的数密度之和)大于铁离子数密度N2的条件下,双掺杂LiNbO3:Fe:Mn晶体全 关键词

关 键 词:双掺杂  单晶铁电晶体  LiNbO3  全息存储动力学
收稿时间:1999-07-10
修稿时间:9/5/1999 12:00:00 AM

THE DYNAMICS OF HOLOGRAPHIC STORAGE IN DOUBLY DOPED LiNbO3:Fe:Mn
LIU YOU-WEN,LIU LI-REN,GUO YING-CHUN and ZHOU CHANG-HE.THE DYNAMICS OF HOLOGRAPHIC STORAGE IN DOUBLY DOPED LiNbO3:Fe:Mn[J].Acta Physica Sinica,2000,49(5):880-886.
Authors:LIU YOU-WEN  LIU LI-REN  GUO YING-CHUN and ZHOU CHANG-HE
Abstract:Considering the three transport mechanisms of diffusion, drift and the photovoltaic effect, we set up a set of coupling differential equations that describe the dynamics of the two-color holographic storage in doubly doped LiNbO3:Fe:Mn in the case of small signal and modulation, and solve the equations to explain the time dynamic development process of holographic storage by using the numerical calculation method. On the basis of these results, we analyze the effect of oxidation-reduction on the process of holographic storage, the non-volatile holographic storage is realized only if the sum Na of number density of the acceptors (Fe3+ and Mn3+) is larger than the number density of iron ions N2. Diffraction efficiency of fixed grating increases with oxidation, photorefractive sensitivity decreases with oxidation, higher diffraction efficiency is at the cost of lower photorefractive sensitivity. When the concentration of doped iron is constant, the higher the concentration of doped manganese, the larger the effective dynamic range of state of oxidation-reduction is, in which holograph can be saved permanently.
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