Temperature and polarization dependence of transient gratings in azo-dye-doped liquid crystals

被引：9
|
作者：
Kuo, CT
Huang, SY
Kuo, MS
Jang, DJ
机构：
[1] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan
[2] Natl Sun Yat Sen Univ, Ctr Nanosci & Nanotechnol, Kaohsiung 80424, Taiwan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2005年 / 44卷 / 5A期
关键词：
transient gratings; diffraction; isomerization; reorientation; anisotropy;
D O I：
10.1143/JJAP.44.3111
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The dynamic behavior of transient gratings (TGs) formed in a planar-aligned azo-dye-doped liquid crystal film is investigated. The temporal profile of the diffraction efficiency of TGs reveals two components corresponding to the fast photoinduced isomerization of azo dye molecules and the slow dye-induced reorientation of liquid crystals. The polarization dependence of diffraction efficiency shows a strong anisotropy of excitation. The temperature dependence of diffraction efficiency and the corresponding relaxation time of decay in the slow component of diffraction reveal a thermal effect on grating formation.
引用
收藏
页码：3111 / 3114
页数：4
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