摘要
使用马克条纹和实时极化方法对掺杂型聚合物( DR1/PMMA )薄膜及其极化工艺进行了深入的研究。实验表明,在一定温度下,如果聚合物薄膜预烘时间不足,则极化时二次谐波强度很弱,极化驰豫也很快;预烘时间过长对二次谐波强度变化没有明显影响。也证实薄膜厚度在相干长度下,二次谐波强度最大。
The doped polymer films and their polarization process are studied by using Maker fringe and real-time polarization method. The experiments show that under the given conditions if pre-baking time of polymer film is insufficient, then the SHG (secondary harmonic generation) intensity is very weak in polarization, the polarization relaxation is very fast and too long pre-baking time has no obvious influence on the SHG intensity. The experiments also demonstrate that the SHG intensity for the film thickness under coherent length is the biggest.
出处
《光电工程》
EI
CAS
CSCD
北大核心
2004年第4期28-31,共4页
Opto-Electronic Engineering
基金
国家自然科学基金项目(60237010)
上海市科委光科技项目(012261021)
上海市应用材料和发展基金项目(0111)
关键词
聚合物薄膜
薄膜厚度
极化务件
二次谐波振荡
Polymer film
Film thickness
Polarization conditions
Secondary harmonic generation
