Molecular migration mechanism for laser induced surface relief grating formation

被引：108

作者：

Fiorini, C ^{[1
]}

Prudhomme, N ^{[1
]}

de Veyrac, G ^{[1
]}

Maurin, I ^{[1
]}

Raimond, P ^{[1
]}

Nunzi, JM ^{[1
]}

机构：

[1] CEA Saclay, LETI, CEA Technol Avancees, DEIN,SPE,Grp Composants Organ, F-91191 Gif Sur Yvette, France

来源：

SYNTHETIC METALS | 2000年 / 115卷 / 1-3期

关键词：

azo-dye polymers; holography; photoinduced gratings; molecular movements;

D O I：

10.1016/S0379-6779(00)00332-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Direct and reversible holographic recording of surface-relief gratings in ate-dye polymers was recently evidenced using atomic force microscopy. Irradiation with an interference pattern of polarized laser beams was observed to lead to substantial mass-transport. In typical experiments, the wavelength of the laser was chosen to he near the absorption of the chromophores. The surface gratings have a negative amplitude which can be as large as twice the polymer film thickness. The origin of such photo-driven mass transport is still unclear. We provide here experimental evidence of a migration of the chromophores from high to low intensity regions. It indicates that, in such doped or grafted guest-host systems, polymer chain migration is a result of the guest chromophores photoinduced movements. This is in good agreement with our recently developed model of ate-dye photoinduced translation diffusion. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：121 / 125

页数：5

共 22 条

[1] Model of laser-driven mass transport in thin films of dye-functionalized polymers [J].