One- and two-photon induced birefringence in Salen dye cast films

被引：10
作者：
Cardoso, M. R.
Neves, U. M.
Misoguti, L.
Ye, Zhihong
Bu, Xiu R.
Mendonca, C. R.
机构：
[1] Inst Fis Sao Carlos, Dept Fis & Ciencia Mat, BR-13560970 Sao Carlos, SP, Brazil
[2] Clark Atlanta Univ, Dept Chem, Atlanta, GA 30314 USA
[3] Clark Atlanta Univ, NASA, Ctr High Performance Polymers & Composites, Atlanta, GA 30314 USA
来源：
OPTICAL MATERIALS | 2006年 / 28卷 / 8-9期
基金：
美国国家卫生研究院; 巴西圣保罗研究基金会; 美国国家航空航天局;
关键词：
azopolymers; birefringence; optical storage; two-photon absorption;
D O I：
10.1016/j.optmat.2005.06.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, we present the one- and two-photon optically induced birefringence in cast films of amorphous poly(methyl methacrylate) (PMMA), containing a new series of organometallic azoaromatic compounds, referred to as Salen dyes, which may be used in optical storage applications. For the one-photon optically induced birefringence, longer writing times were required for the organometallic compounds in comparison with the nonmetal one, probably due to the higher degree of aggregation in the azoaromatic moieties that precludes molecular orientation. Furthermore, as a novelty concerning optical storage, two-photon optically induced birefringence could be achieved in the Salen dyes guest-host films, which allows their application in three-dimensional optical memories. (C) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：1118 / 1122
页数：5
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