Off-resonant nonlinear optical refraction properties of azo dye doped nematic liquid crystals

被引：9
|
作者：
Li, Hongjing [1 ]
Wang, Jianhao [2 ]
Wang, Changshun [1 ]
Zeng, Pengfei [1 ]
Cai, Peng [1 ]
Pan, Yujia [1 ]
Yang, Yifei [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Phys & Astron, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China
[2] E China Normal Univ, Dept Chem, Shanghai Key Lab Green Chem & Chem Proc, Shanghai 200062, Peoples R China
来源：
OPTICAL MATERIALS EXPRESS | 2016年 / 6卷 / 02期
基金：
中国国家自然科学基金;
关键词：
HOLOGRAPHIC GRATINGS; REORIENTATION; PHOTOISOMERIZATION; PHASE; FILMS;
D O I：
10.1364/OME.6.000459
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nonlinear optical refraction properties of azo dye doped nematic liquid crystals were investigated with a He-Ne laser (lambda = 632.8 nm) as offresonant light irradiation using spatial self-phase modulation method. Compared with the experimental results of resonant light (lambda = 532 nm), the sample irradiated by He-Ne laser exhibited lower optical threshold and the number of diffraction rings was sensitive to the laser polarization. The mechanism of nonlinear optical response of azo dye doped nematic liquid crystals at 632.8 nm could be mainly attributed to photoisomerization effect. Moreover, the diffractions of holographic gratings recorded by He-Ne laser in azo dye doped liquid crystals were consistent with the grating formation based on photoisomerization effect. (C) 2016 Optical Society of America
引用
收藏
页码：459 / 465
页数：7
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