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 LiNbO3：Ce：C...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 LiNbO3：Ce：Cu crystals on the external electric field. The dominative photovoltaic effect of the non-volatile holographic recording in doubly doped LiNbO3 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.展开更多
Nonvolatile holographic recording is performed with green light in LiNbO3：Ce：Cu crystals. The refractiveindex change and the recording sensitivity are times better than those obtained by recording with red light, an...Nonvolatile holographic recording is performed with green light in LiNbO3：Ce：Cu crystals. The refractiveindex change and the recording sensitivity are times better than those obtained by recording with red light, and higher optical fixing efficiency is obtained. Correspondingly, theoretical investigations are given.展开更多
基金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）.
文摘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 LiNbO3：Ce：Cu crystals on the external electric field. The dominative photovoltaic effect of the non-volatile holographic recording in doubly doped LiNbO3 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.
基金This work was supported by the Science and Tech-nology Committee of China (No. 2002CCA03500) the National Natural Science Foundation of China (No.60177016).
文摘Nonvolatile holographic recording is performed with green light in LiNbO3：Ce：Cu crystals. The refractiveindex change and the recording sensitivity are times better than those obtained by recording with red light, and higher optical fixing efficiency is obtained. Correspondingly, theoretical investigations are given.
