中国物理B ›› 2005, Vol. 14 ›› Issue (5): 995-998.doi: 10.1088/1009-1963/14/5/024
徐英1, 洪治1, 张明2
Zhang Ming (张明)ab, Xu Ying (徐英)a, Hong Zhi (洪治)a
摘要: Dark decay behaviors of photorefractive grating in Ce:BaTiO3 crystal are studied experimentally. It is observed that two deep-trap levels, i.e. Fe-ion deep level and Ce-ion deep level, both participate in the photorefractive process. A simplified two-deep model is presented based on the one-deep trap model and the shallow-deep trap model, with which we analyze quantitatively the contribution of each deep level to the whole space-electric field and thus the photorefractive grating varying with the different grating wave vectors and different writing intensities.
中图分类号: