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Face-Centered-Cubic Artificial Opal Embedded with CdS Quantum
Dots |
XU Ling;LI Ming-Hai;ZHANG Yu;MA Yi;XU Jun;HUANG Xin-Fan;CHEN Kun-Ji |
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093 |
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Cite this article: |
XU Ling, LI Ming-Hai, ZHANG Yu et al 2002 Chin. Phys. Lett. 19 1377-1379 |
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Abstract Highly monodispersed colloidal silica spheres in sub-micrometer size with distribution standard deviation less than 5% were synthesized by a chemical method. Using the self-crystallization of the silica spheres, we successfully obtained the three-dimensional close-packed fcc silica matrices and artificial opals. Then, a colloidal photonic crystal embedded with CdS quantum dots (QDs) was also chemically prepared by using artificial opals as a template. A reflection spectra study reveals that both artificial opals with and without CdS QDs possess (111) directional photonic bandgap features.
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Keywords:
81.16.Dn
68.65.Hb
42.70.Qs
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Published: 01 September 2002
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PACS: |
81.16.Dn
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(Self-assembly)
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68.65.Hb
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(Quantum dots (patterned in quantum wells))
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42.70.Qs
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(Photonic bandgap materials)
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