Acta Scientiarum Naturalium Universitatis Pekinensis

Previous Articles     Next Articles

Response Time Characteristics of Proton-implanted KNbO3 Crystals

LI Qi1, XIA Zonghuang1, WANG Xuemei1, ZHAO Qiang1, SHEN Dingyu1, LU Xiting1, WANG Feng2, CHEN Zhijian2, GONG Qihuang2, SHEN Dezhong3   

  1. 1Department of Technical Physics, Peking University, Beijing, 100871; 2Department of Physics, Mesoscopic Physics Laboratory, Peking University, 100871; 3Research Institute of Synthetic Crystals, Beijing, 100018
  • Received:1999-01-14 Online:1999-09-20 Published:1999-09-20


李旗1,夏宗璜1,王雪梅1,赵强1,沈定予1,卢希庭1, 王锋2,陈志坚2,龚旗煌2, 沈德忠3   

  1. 1北京大学技术物理学系,北京,100871; 2北京大学物理学系,介观物理国家开放实验室,北京,100871; 3国家建材局人工晶体研究所,北京,100018

Abstract: The experimental investigation on the intensity-dependent photorefractive response of the proton-implanted KNbO3 crystals is presented. The decay time constant was measured. The results revealed that two gratings existed simultaneously, one was caused by the photorefractive effect, and the other was contributed from the proton-implantation. The experimental results also reflect that low dose implantation hardly influence the photorefractive decay time.

Key words: ion implantation, photorefractive effect, response time

摘要: 实验研究了质子辐照的KNbO3晶体随光强变化的光折变响应特性,并测量了其光折变时间常数。实验结果揭示出在质子辐照后的KNbO3晶体中存在着2种不同的光栅,其一是慢成分,是由晶体本身的光折变效应所产生;另一个则是快成分,是由于质子辐照后所产生的辐照效应。实验结果还反映出这2种光栅是由2种不同种类的载流子产生的。

关键词: 离子辐照, 光折变效应, 响应时间

CLC Number: