Substituent-dependence of the third-order nonlinear optical properties of 2,5-dialkoxy-PPV derivatives

被引：3

作者：

Cassano, T ^{[1
]}

Tommasi, R ^{[1
]}

Ferrara, M ^{[1
]}

Babudri, F ^{[1
]}

Farinola, GM ^{[1
]}

Naso, F ^{[1
]}

机构：

[1] INFM, I-70126 Bari, Italy

来源：

LINEAR, NONLINEAR, AND POWER-LIMITING ORGANICS | 2000年 / 4106卷

关键词：

PPV; third-order susceptibility; nonlinear optics; Z-scan;

D O I：

10.1117/12.408530

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of the chemical structure on the chi ((3)) Of organic molecules has been selectively investigated in three poly(2,5-dialkoxy-1,4-phenylenevinylene) polymers. They have similar degrees of polymerization and polydispersity indexes and differ only for the structure of the side groups in the 2,5 positions of the phenylene rings, that are respectively C8 linear and C5 branched alkoxy chains and C12 bridged closed dialoxy chain. Z-scan measurements show that all the investigated substituted-PPVs exhibit a small Im chi ((3)) and a large, negative Re-(3) at lambda =1064 nm. The obtained results yield evidence of a considerable dependence of the third-order nonlinear optical properties on the steric effect of the substituents.

引用

页码：395 / 403

页数：9

共 20 条

[11] Conformation and solvent dependence of the first and second molecular hyperpolarizabilities of charge-transfer chromophores. Quantum-chemical calculations [J].