Open AccessTheoretical studies on nonvolatile holographic recording for LiNbO3:Cu:Ce crystals
Author(s) -
Yan Shen,
Guoqing Zhang,
Wei Yu,
Zhishan Guo,
Yunqiang Zhao
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.184205
Subject(s) - quantum tunnelling , electron holography , holography , materials science , electron , charge (physics) , space charge , center (category theory) , penning trap , optoelectronics , optics , physics , chemistry , quantum mechanics , crystallography
The steady-state nonvolatile two-step, two-color holographic recording performance is studied theoretically for LiNbO3:Cu:Ce based on the two-center model, with taking into account the direct electron transfer between the deep-trap center Cu+/Cu2+ and the shallow-trap center Ce3+/Ce4+ due to the tunneling effect. The results show that the total space-charge field is determined by the space-charge field on the deep-trap center, and the direct electron exchange between the Cu+/Cu2+ and the Ce3+/Ce4+ levels through the tunneling effect dominates the charge-transfer process in the two-step, two-color holographic recording. Therefore, the material parameters related to this direct tunneling process play a key role in the two-step, two-color holography performance.