表面修饰的Bi_2O_3纳米微粒的光学特性  

Optical Properties of Coated Bi_2O_3 Nanoparticles

作　　者：韩俊鹤[1] 欧慧灵[1] 廖鹏[1] 王长顺[1] 顾玉宗[1] 余保龙[1] 

机构地区：[1]河南大学物理系,河南开封475001

出　　处：《河南大学学报（自然科学版）》2001年第3期14-16,共3页Journal of Henan University:Natural Science

摘　　要：实验发现 ,当波长为 6 32 .8nm的基模 (TEM0 0 )He -Ne激光入射到厚度为 5mm的包覆十二烷基苯磺酸钠(DBS)的Bi2 O3 样品上时 ,在观察屏上出现多重衍射环 ,这是空间自相位调制的结果 .同时 ,还发现样品具有自聚焦、自陷和自散焦现象 .实验结果表明包覆DBS的Bi2 O3 纳米微粒具有大的非线性系数 (n2 =3.0× 10 -5esu)The experiment indicates that multiple diffraction rings appear at the observation screen as a 632.8?nm He_Ne TEM 00 _Mode laser passes through a coated Bi 2O 3-DBS nanoparticles. The phenomenon is the result of spatial self_phase modulation. Meanwhile, self_focusing, self_trapping and self_defocusing in this material has also been observed. The study result indicates that the nonlinear coefficient is very large( n 2=3.0×10 -5 ?esu).

关 键 词：自相位调制 非线性系数 自陷 自聚焦 自散焦 氧化铋纳米微粒 非线性光学特性 

分 类 号：TB383[一般工业技术—材料科学与工程]