کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
76719 | 49147 | 2007 | 8 صفحه PDF | دانلود رایگان |
Inverse opals with skeleton structure are photonic crystals with two complete band gaps. Additionally to the gap between eighth and ninth bands typical for inverse opals, they can have a gap between fifth and sixth bands if the refractive index exceeds 2.9. The currently known skeleton structures are formed by a sol–gel process. This process delivers different structural parameters depending on the synthesis details. A connection among the structural parameters is revealed and interpreted in this paper. The structures consist of very porous titania cylinders which are not sufficient to obtain a full band gap. They offer, however, a possibility of improvement by filling or coating of the porous cylinders with high-refractive index materials. The optimum coating thickness is determined theoretically.
Journal: Microporous and Mesoporous Materials - Volume 99, Issue 3, 10 February 2007, Pages 236–243