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Third-order optical nonlinearity of CdS nanocrystals embedded in sodium borosilicate glass studied by the Z-scan technique

Published online by Cambridge University Press:  31 January 2011

Xin-yu Yang ,
Wei-dong Xiang ,
Xi-yan Zhang ,
Xiao-juan Liang ,
Hai-tao Liu ,
Shi-xun Dai  and
Fei-fei Chen
Wei-dong Xiang*
Affiliation:
College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China; and College of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China
Xi-yan Zhang
Affiliation:
College of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China
Hai-tao Liu
Affiliation:
College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
Fei-fei Chen
Affiliation:
College of Information Science and Engineering, Ningbo University, Ningbo 315211, China
*
a)Address all correspondence to this author. e-mail: weidongxiang@yahoo.com.cn
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Abstract

CdS nanocrystals embedded in sodium borosilicate glass were synthesized through sol-gel process. The CdS nanocrystals were usually 10 to 20 nm in size. The microstructure of CdS nanocrystals was determined to be of the hexagonal phase. The morphology and microstructure of the glass were examined using diverse techniques including scanning-probe microscopy (SPM), x-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), energy dispersion x-ray spectra (EDAX), and high-resolution TEM (HRTEM). The linear optical absorption spectrum of the glass showed a blue shift as a result of quantum-size effect. Furthermore, the third-order optical nonlinearities of the glass were studied by Z-scan technique at a wavelength of 770 nm. The results showed that the third-order optical nonlinear refractive index γ, absorption coefficient β, and susceptibility χ(3) were determined to be −2.16 × 10−16 m2/W, 6.32 × 10−11 m/W, and 1.20 × 10−10 esu, respectively, which were greater than those reported previously for CdS nanocrystals embedded in different matrices.

Keywords

Sol-gelOptical propertiesMicrostructure

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Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 3 , March 2010 , pp. 491 - 499
Copyright
Copyright © Materials Research Society 2010

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