Self-assembled ZnO colloidal photonic crystals: Light channels in cracks

被引：7
|
作者：
Xie Juan [1 ]
Deng Hong [1 ]
Xu Zi-Qiang [1 ]
Li Yan [1 ]
Huang Jun [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Microelect & Solid State Elect, Chengdu 610054, Peoples R China
来源：
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2006年 / 9卷 / 1-3期
关键词：
zinc oxide; photonic crystal; self-assembly; crack;
D O I：
10.1016/j.mssp.2006.01.068
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Large-area films of colloidal photonic crystals (PCs) were prepared by self-assembly technique. The films contain ordered PC domains separated by cracks. The size of the domains and cracks can be controlled by the drying process. The angular dependence of the stop-band was studied by changing the angle of incidence 0 between the beam and the (1 1 1) direction, from 0 degrees to 60 degrees. The observed stop-bands are almost independent of the density of cracks. It is seen that as the angle increases the stop-band shifts to shorter wavelengths. We demonstrate that the photoluminescence emission spectra depend on the PC domain size and on the concentration of cracks. For a film with small density of cracks, we observed light channeling through cracks probably due to light inhibition. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：136 / 140
页数：5
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