Light-induced circular birefringence in cyanoazobenzene side-chain liquid-crystalline polyester films

被引：32

作者：

Naydenova, I

Nikolova, L

Ramanujam, PS

Hvilsted, S

机构：

[1] Bulgarian Acad Sci, Cent Lab Opt Storage & Proc Informat, BU-1113 Sofia, Bulgaria

[2] Riso Natl Lab, Opt & Fluid Dynam Dept, DK-4000 Roskilde, Denmark

[3] Riso Natl Lab, Condensed Matter Phys & Chem Dept, DK-4000 Roskilde, Denmark

来源：

JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS | 1999年 / 1卷 / 04期

关键词：

photoinduced optical anisotropy; circular birefringence; azodye polymers;

D O I：

10.1088/1464-4258/1/4/303

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the inducement of large circular birefringence (optical activity) in films of a cyanoazobenzene side-chain liquid-crystalline polyester on illumination with circularly polarized light. The polyester has no chiral groups and is initially isotropic. The induced optical rotation is up to 5 degrees mu m(-1) at 633 nm and three to four times larger at 488 nm. The effect is explained through photoinduced changes in the structure of the polymer films due to reorientation of the rod-like chromophores and angular momentum transfer from the circularly polarized light to the azobenzene side chains.

引用

页码：438 / 441

页数：4

共 20 条

[1] OPTICALLY-ACTIVE POLYMERS CONTAINING SIDE-CHAIN AZOBENZENE CHROMOPHORES - CHIROPTICAL PROPERTIES AND PHOTOCHROMIC BEHAVIOR OF 4-METHACRYLOXYAZOBENZENE (-)-MENTHYL METHACRYLATE COPOLYMERS [J].