Modification of spontaneous emission from fluorescent spheres by partially disordered photonic crystals

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• 作者：Zheng-qi Liu^a ; ^b ; Gui-qiang Liu^a ; ^{liougq@yahoo.com.cn} ; Yuan-hao Chen^a ; Kuan Huang^a ; Ying Hu^a ; Xiang-nan Zhang^a ; Zheng-jie Cai^a ; Xiao-shan Liu^a ; Guo-lan Fu^a
• 关键词：Optical materials and property ; Luminescence ; Spectroscopy
• 刊名：Materials Letters
• 出版年：2013
• 出版时间：15 June, 2013
• 年：2013
• 卷：101
• 期：Complete
• 页码：44-46
• 全文大小：851 K

文摘

Partially disordered three-dimensional photonic crystals (PCs) were fabricated by self-assembly of small polystyrene spheres doped with large fluorescent spheres. Photoluminescence measurements show that the introduced disorder largely affects the spontaneous emission (SE) behaviors of the fluorescent spheres. Two pronounced emission peaks found at 565 nm and 620 nm gradually merge into one emission peak with the doping concentration increase from 0.02 wt % to 0.20 wt % , accompanied by the red-shift of the main emission peak. The dynamic modification of SE originates from the deterioration of stop band of PCs due to the disorder aggravated by increasing the doping concentration. The efficient modification on the emission intensity and frequency indicates potential applications in random lasing.