光学学报, 2000, 20 (5): 597, 网络出版: 2006-08-09
光折变Fe:LiNbO3晶体中质子与热激发电子之间的竞争
The Competition Between the Protons and the Thermally Excited Electrons in Photorefractive Fe:LiNbO3 Crystal
摘要
研究了Fe:LiNbO3晶体的光折变性能随晶体温度变化的动态性质。实验结果显示,质子与热激发电子之间存在着强烈的竞争,在较低的温度下(低于120℃),在晶体光折变响应时间内,质子对晶体的光折变性能的影响很小,而电子的热激发速率β随晶体温度的变化将是影响晶体光折变性能的主要因素;而在较高温度时(高于120℃),质子由于迁移率的增大而开始显著地影响晶体的光折变性能。
Abstract
The dynamic variations of the photorefractive properties of Fe:LiNbO3 crystal via the crystal temperature were investigated.The results show that there is strong competition between the protons and the thermally excited electrons.Within the response time of the photorefractive gratings,the effect of protons on the photorefractive properties of Fe:LiNbO3 crystal is weak,and the variation of thermal excitation coefficient of electron β will be the dominate factor that affects the photorefractive properties of Fe:LiNbO3 if the crystal temperature is below 120℃.When the crystal temperature is higher than 120℃,the protons will have important effect on the photorefractive properties of Fe:LiNbO3 crystal because of its increasing mobility.
张国权, 张万林, 孙骞, 许京军, 张心正, 刘思敏, 张光寅. 光折变Fe:LiNbO3晶体中质子与热激发电子之间的竞争[J]. 光学学报, 2000, 20(5): 597. 张国权, 张万林, 孙骞, 许京军, 张心正, 刘思敏, 张光寅. The Competition Between the Protons and the Thermally Excited Electrons in Photorefractive Fe:LiNbO3 Crystal[J]. Acta Optica Sinica, 2000, 20(5): 597.
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