Journal
PHYSICA B-CONDENSED MATTER
Volume 404, Issue 14-15, Pages 2012-2015Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2009.03.031
Keywords
Third-order nonlinearity; Refractive index; Optical band gap; Z-scan
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Funding
- National Natural Science Foundation of China [60677015]
- Tackling Key Project of Science and Technology, Department of Zhejiang Province [2007C21122]
- Natural Science Foundation of Ningbo [2006A610020]
- K C Wong Magna Fund in Ningbo University
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Third-order optical nonlinear characterizations of glasses in Bi2O3-B2O3-TiO2 ternary system were investigated using femto-second Z-scan method at 800 nm. Results show that third-order optical nonlinearities are influenced by TiO2 concentration, the largest value of nonlinear refraction gamma obtained is 8.85 x 10(-14) cm(2)/W. Further. the hyperpolarizability alpha((3)) of Bi-O-Ti4+ units which is considered to be main contribution to the large third-order nonlinearity is estimated to be 1.32 x 10(-33) esu cm(3)/unit. Additionally, enhancement of two-photon absorption process near 0.73E(opg) is observed. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
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