Third-order optical nonlinearity of cadmium sulfide nanoparticles loaded in mesostructured silica materials

Li, Jiaqi, Chen, Hangrong, Chen, Yu, Jiang, Peng, Wei, Chenyang and Shi, Jianlin (2011). Third-order optical nonlinearity of cadmium sulfide nanoparticles loaded in mesostructured silica materials. In: 3rd IEEE International NanoElectronics Conference (INEC)/Symposium on Nanoscience and Nanotechnology in China, Hong Kong, China, (10880-10885). 3-8 January 2010. doi:10.1166/jnn.2011.4084


Author Li, Jiaqi
Chen, Hangrong
Chen, Yu
Jiang, Peng
Wei, Chenyang
Shi, Jianlin
Title of paper Third-order optical nonlinearity of cadmium sulfide nanoparticles loaded in mesostructured silica materials
Conference name 3rd IEEE International NanoElectronics Conference (INEC)/Symposium on Nanoscience and Nanotechnology in China
Conference location Hong Kong, China
Conference dates 3-8 January 2010
Journal name Journal of Nanoscience and Nanotechnology   Check publisher's open access policy
Place of Publication Valencia, CA, United States
Publisher American Scientific Publishers
Publication Year 2011
Sub-type Fully published paper
DOI 10.1166/jnn.2011.4084
Open Access Status
ISSN 1533-4880
1533-4899
Volume 11
Issue 12
Start page 10880
End page 10885
Total pages 6
Language eng
Abstract/Summary Cadmium sulfide nanoparticles have been successfully incorporated in three forms of CTABtemplated mesoporous silica materials: one is the mesoporous silica spheres suspended in ethanol solution, the other is the mesoporous silica spheres spin-coated on glass slide, and the third is the dip-coated mesoporous silica thin film. The mesostructures were characterized by XRD and TEM, respectively. Linear optical properties were investigated using UV-visible spectra, and the diameter of the incorporated CdS nanoparticles was measured to be around 3.1 nm. Z-scan technique manifested that these three composites exhibited distinct third-order optical nonlinearities due to the different preparation techniques. Reverse saturation absorption could be detected in the CdS-loaded mesoporous silica spheres suspended in solution, while those dispersed on glass slide presented saturation absorption. The difference in nonlinear absorption of the two mesoporous silica sphere samples could be attributed to defect-related transitions. On the contrary, the CdS-loaded mesoporous silica thin film showed self-defocusing behavior with no nonlinear absorption signals. Compared to that of the CdS nanoparticles with larger size previously reported, the intrinsic microscopic third-order nonlinear optical susceptibility of those incorporated in CTAB-templated mesoporous thin film was increased as predicted by the quantum theory, and the third-order optical nonlinearity was further determined to arise from intraband transitions induced by quantum confinement. Copyright
Keyword Defect-related transition
Mesoporous materials
Quantum confinement
Semiconductor nanoparticles
Third-order nonlinear absorption
Third-order nonlinear refraction index
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Conference Paper
Collection: School of Chemical Engineering Publications
 
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