Two-photon isomerization and orientation of photoisomers in thin films of polymer

被引：38

作者：

Sekkat, Z

Ishitobi, H

Kawata, S

机构：

[1] Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Handai Frontier Res Ctr, FRC, Suita, Osaka 5650871, Japan

[3] Al Akhawayn Univ, Sch Sci & Engn, Ifrane 53000, Morocco

来源：

OPTICS COMMUNICATIONS | 2003年 / 222卷 / 1-6期

关键词：

D O I：

10.1016/S0030-4018(03)01555-4

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present experimental evidence of two-photon isomerization and orientation of a diarylethene derivative in films of poly-methyl-methacrylate. The changes of the linear absorption spectrum of the photochromic sample before and after infra-red, high power, pulsed, excitation are consistent with chromophores isomerization induced by two-photon absorption. The slopes of the real-time dynamics of two-photon isomerization showed the square law dependence on the pump light intensity. Two-photon molecular orientation was induced in the polymer samples by polarized infra-red excitation, and it was observed by dichroic absorption on the entire ultraviolet-visible spectrum of the isomers. Molecular reorientation by photoisomerization is inferred as a possible mechanism of the observed two-photon orientation. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：269 / 276

页数：8

共 16 条

[1] Design of organic molecules with large two-photon absorption cross sections [J].