OBSERVATION OF PHOTOREFRACTIVE EFFECT OF KNbO3 CRYSTAL ATμW ILLUMINATION

• 来源期刊: 中国物理(海外版)
• 关键词: ion-implantation photorefractive effect ferroelectric crystals
• 年，卷（期）: 2000,（11）
• 所属期刊栏目: CONDENSED MATTER:STRUCTURE,THERMAL AND
• 页码范围: 841-843
• 页数: 3页
• 分类号: 6180J,7820W,4270G
• 语种: 英文

摘要

The photorefractive effects of the as-grown and proton-implanted KNbO3 crystals were studied by two-wave mixing at 62.2 μW/cm2 illumination.At this pump power level,the as-grown crystal showed little photorefractive effect,while the proton-implanted crystal showed an obvious effect.Furthermore,there seemed to exist two photorefractive gratings with response times of 22.54 and 1596.30s,at 62.2μW/cm2 pump power level,in the proton-implanted sample.This phenomenon has been attributed to the influence of proton-implantation.