Applied electric field to fabricate colloidal crystals with the photonic band-gap in communication waveband |
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Authors: | Yan Hai-Tao Wang Ming Ge Yi-Xian Yu Ping |
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Affiliation: | Jiangsu Key Lab on Opto-Electronic Technology, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210097, China |
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Abstract: | The macropore silica colloidal crystal templates were assembledorderly in a capillary glass tube by an applied electric fieldmethod to control silica deposition. In order to achieve thephotonic band gap (PBG) of colloidal crystal in opticalcommunication waveband, the diameter of silica microspheres isselected by Bragg diffraction formula. An experiment was designed totest the bandgap of the silica crystal templates. This paperdiscusses the formation process and the close-packed fashion of thesilica colloidal crystal templates was discussed. The surfacemorphology of the templates was also analyzed. The results showedthat the close-packed fashion of silica array templates wasface-centered cubic (FCC) structure. The agreement is very good between theexperimental data and the theoretical calculation. |
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Keywords: | colloidal crystal photonicbandgap materials optical communications fiber |
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