Z-scan measurement for the nonlinear absorption of Bi2.55La0.45TiNbO9 thin films

被引：3

作者：

Chen, Hengzhi ^{[1
]}

Yang, Bin ^{[1
]}

Zhang, Mingfu ^{[2
]}

Wang, Feiyan ^{[3
]}

Cheah, Kokwai ^{[3
]}

Cao, Wenwu ^{[1
,4
]}

机构：

[1] Harbin Inst Technol, Dept Phys, Ctr Condensed Matter Sci & Technol, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, Ctr Composite Mat, Harbin 150001, Peoples R China

[3] Hong Kong Baptist Univ, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[4] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

来源：

MATERIALS LETTERS | 2010年 / 64卷 / 05期

关键词：

Nonlinear optical absorption; Bi2.55La0.45TiNbO9; Pulsed laser deposition; Optical constant; 3RD-ORDER OPTICAL NONLINEARITY; BISMUTH TITANATE; CERAMICS;

D O I：

10.1016/j.matlet.2009.12.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bi2.55La0.45TiNbO9 (BLTN-0.45) thin films with layered aurivillius structure were fabricated on fused silica substrates by pulsed laser deposition technique. Their structure, fundamental optical constants. and nonlinear absorption characteristics have been studied. The film exhibits a high transmittance (>60%) in visible-infrared region. The optical band gap energy was found to be 3.44 eV. The optical constant and thickness of the films were characterized using spectroscopic ellipsometric (SE) method. The nonlinear optical absorption properties of the films were investigated by the single-beam Z-scan method at a wavelength of 800 nm laser with a duration of 80 fs. We obtained the nonlinear absorption coefficient beta = 4.64 x 10(-8) m/W. The results show that the BLTN-0.45 thin film is a promising material for applications in absorbing-type optical device. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：589 / 591

页数：3

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