中国物理B ›› 2005, Vol. 14 ›› Issue (12): 2491-2495.doi: 10.1088/1009-1963/14/12/020

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Improvement in refractive-index change in LiNbO3:Ce:Cu by applying an external electric field

戴翠霞, 刘立人, 刘德安, 周煜, 柴志方, 栾竹   

  1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2005-02-03 修回日期:2005-09-29 出版日期:2005-12-20 发布日期:2005-12-20
  • 基金资助:
    Project supported by the State Science and Technology Commission of China (Grant No 2002CCA03500) and the National Natural Science Foundation of China (Grant No 60177016).

Improvement in refractive-index change in LiNbO3:Ce:Cu by applying an external electric field

Dai Cui-Xia (戴翠霞), Liu Li-Ren (刘立人), Liu De-An (刘德安), Zhou Yu (周煜), Chai Zhi-Fang (柴志方), Luan Zhu (栾竹)   

  1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2005-02-03 Revised:2005-09-29 Online:2005-12-20 Published:2005-12-20
  • Supported by:
    Project supported by the State Science and Technology Commission of China (Grant No 2002CCA03500) and the National Natural Science Foundation of China (Grant No 60177016).

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摘要： By jointly solving two-centre material equations with a nonzero external electric field and coupled-wave equations, we have numerically studied the dependence of the non-volatile holographic recording in LiNbO$_{3}$:Ce:Cu crystals on the external electric field. The dominative photovoltaic effect of the non-volatile holographic recording in doubly doped LiNbO$_{3}$ crystals is directly verified. And an external electric field that is applied in the positive direction along the $c$-axis (or a large one in the negative direction of the $c$-axis) in the recording phase and another one that is applied in the negative direction of the $c$-axis in the fixing phase are both proved to benefit strong photorefractive performances. Experimental verifications are given with a small electric field applied externally.

关键词: non-volatile holographic recording, external electric field, refractive-index change, \linebreak \hbox{\hskip 1.95cm} LiNbO$_{3}$:Ce:Cu crystals

Abstract: By jointly solving two-centre material equations with a nonzero external electric field and coupled-wave equations, we have numerically studied the dependence of the non-volatile holographic recording in LiNbO$_{3}$:Ce:Cu crystals on the external electric field. The dominative photovoltaic effect of the non-volatile holographic recording in doubly doped LiNbO$_{3}$ crystals is directly verified. And an external electric field that is applied in the positive direction along the $c$-axis (or a large one in the negative direction of the $c$-axis) in the recording phase and another one that is applied in the negative direction of the $c$-axis in the fixing phase are both proved to benefit strong photorefractive performances. Experimental verifications are given with a small electric field applied externally.

Key words: non-volatile holographic recording, external electric field, refractive-index change, LiNbO$_{3}$:Ce:Cu crystals

中图分类号:  (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))

  • 78.20.Ci
72.40.+w (Photoconduction and photovoltaic effects) 42.40.Ht (Hologram recording and readout methods)