Tuned intensity-dependent refractive index n2 and two-photon absorption in oxide glasses: Role of non-bridging oxygen bonds in optical nonlinearity

被引：22

作者：

El-Diasty, Fouad ^{[1
]}

Abdel-Baki, Manal ^{[2
]}

Abdel-Wahab, F. A. ^{[1
]}

机构：

[1] Ain Shams Univ, Fac Sci, Dept Phys, Cairo 11566, Egypt

[2] Natl Res Ctr, Glass Dept, Cairo 12311, Egypt

来源：

OPTICAL MATERIALS | 2008年 / 31卷 / 02期

关键词：

Glass; Oxide glasses; Optical nonlinearity; Nonlinear refractive index; Nonlinear absorption; Two-photon absorption; Non-bridging oxygen bonds; Band gap;

D O I：

10.1016/j.optmat.2008.02.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Several nonlinear glass parameters such as second-order refractive index, n(2), third-order susceptibility lambda((3)), the imaginary part of lambda((3)) and two-photon absorption coefficient are calculated for five different oxide glass systems. The glasses exhibit considerable optical non-linearities. It has been found that the decrease in band gap energy and Fermi energy increases the glass nonlinear optical properties. Glasses contain either chromium oxide, magnesium or barium oxide exhibit considerable nonlinearity comparing with titanium-containing glasses. The origin of this nonlinearity and the ability to tune it has been discussed based on the glass linear refractive indices, non-bridging oxygen bonds, hyperpolarizability of modifier cations and on the rule of these cations oil the creation of nonbridging oxygen bonds. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：161 / 166

页数：6

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