Optical birefringence induced by two-photon absorption in polythiophene bearing an azochromophore

被引：20

作者：

Correa, D. S. ^{[1
]}

Cardoso, M. R. ^{[1
]}

Goncalves, V. C. ^{[1
]}

Balogh, D. T. ^{[1
]}

De Boni, L. ^{[1
]}

Mendonca, C. R. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

POLYMER | 2008年 / 49卷 / 06期

基金：

巴西圣保罗研究基金会;

关键词：

birefringence; trans-cis isomerization; two-photon absorption;

D O I：

10.1016/j.polymer.2008.01.054

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We carried out experiments of induced birefringence via two-photon absorption in spin-coated films of the conjugated polymer poly[2-[ethyl-[4-(4-nitro-phenylazo)-phenyl] -amino]-ethane (3-thienyl)ethanoate], PAzT, at 680 and 775 nm. This process allows recording in the bulk because of the spatial confinement of the bireffingence provided by the two-photon absorption. The induced birefringence is associated with molecular reorientation caused by the two-photon induced isomerization of the azochromophores attached to the polymer backbone. In addition, the two-photon absorption spectrum of PAzT was measured to help selecting the excitation wavelength for two-photon absorption induced birefringence. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1562 / 1566

页数：5

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