Degenerate two-photon absorption spectra in azoaromatic compounds

被引：60

作者：

De Boni, L ^{[1
]}

Misoguti, L ^{[1
]}

Zílio, SC ^{[1
]}

Mendonça, CR ^{[1
]}

机构：

[1] Univ Sao Paulo, Dept Fis & Ciencia Mat, BR-13560970 Sao Carlos, SP, Brazil

来源：

CHEMPHYSCHEM | 2005年 / 6卷 / 06期

关键词：

azo compounds; dyes/pigments; laser spectroscopy; nonlinear optics; two-photon absorption;

D O I：

10.1002/cphc.200400391

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：

A systematic study of the degenerate two-photon absorption (2PA) spectra of seven azoaromatic compounds in dimethyl sulfoxide solution is reported, which employed the Z-scan technique with femtosecond laser pulses from the bottom of the azo compound absorption bands up to 1100 nm. The 2PA peaks for pseudostilbene-type azo compounds (Disperse Orange (DO) 3, Disperse Red (DR) 13, DR1, DR19, and DR19-Cl) were observed at twice the peak wavelength of the linear absorption. However, such peaks were not observed for other azo compounds (PAMINO and DIAMINO) because of the symmetry of these molecules. A resonance enhancement of the 2PA cross-section was observed for all compounds. The 2PA peak and the nonlinear resonance enhancement behavior could be adjusted with a model based on perturbation theory. Such knowledge can be a guideline to the understanding of the 2PA process in azoaromatic compounds.

引用

页码：1121 / 1125

页数：5