Nonlinear optical properties of two oxazine dyes in aqueous solution and polyacrylamide hydrogel using single beam Z-scan

被引：36

作者：

Milanchian, K. ^{[4
]}

Tajalli, H. ^{[2
,3
,4
]}

Gilani, A. Ghanadzadeh ^{[1
,2
,3
]}

Zakerhamidi, M. S. ^{[2
]}

机构：

[1] Univ Guilan, Dept Chem, Fac Sci, Rasht, Iran

[2] Univ Tabriz, Res Inst Appl Phys & Astron, Tabriz, Iran

[3] Univ Tabriz, Photon Excellence Ctr, Tabriz, Iran

[4] Univ Tabriz, Fac Phys, Tabriz, Iran

来源：

OPTICAL MATERIALS | 2009年 / 32卷 / 01期

关键词：

Oxazine dyes; Polyacrylamide; Nonlinearity; Z-scan; POLARIZED IR-SPECTROSCOPY; SOLID-STATE; SUPRAMOLECULAR POLYMERIZATION; STRUCTURAL ELUCIDATION; CRYSTAL-STRUCTURE; TEMPERATURE; ADSORPTION; REFRACTION; DIFFUSION; POLYMERS;

D O I：

10.1016/j.optmat.2009.05.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The nonlinear optical properties of the two oxazine dyes, i.e. oxazine 720 (OX720) and oxazine 750 (OX750), in aqueous solution and in polyacrylamide hydrogel (PAA) matrix were studied by Z-scan technique using CW He-Ne laser at 632.8 nm. All the polymeric and aqueous samples showed a negative nonlinearity and large nonlinear refractive index of the order of 10(-8) cm(2)/W. The concentration-dependent nonlinear refractive index was also investigated. In the case of PAA-dye systems, two types of transit (fast) and steady state (slow) nonlinear effects were observed. It is believed that these effects are due to the thermo-optical induced refractive index gradient and a concentration gradient induced by a temperature gradient present in a medium. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：12 / 17

页数：6

共 52 条

[1] Z-scan determination of the third-order optical nonlinearity of organic dye nile blue chloride [J].