Photonic band structures of quadrangular multiconnected networks

By means of the network equation and generalized dimensionless Floquet-Bloch theorem,this paper investigates the properties of the band number and width for quadrangular multiconnected networks (QMNs) with a different number of connected waveguide segments (NCWSs) and various matching ratio of waveguide length (MRWL).It is found that all photonic bands are wide bands when the MRWL is integer.If the integer attribute of MRWL is broken,narrow bands will be created from the wide band near the centre of band structure.For two-segment-connected networks and three-segment-connected networks,it obtains a series of formulae of the band number and width.On the other hand,it proposes a so-called concept of two-segment-connected quantum subsystem and uses it to discuss the complexity of the band structures of QMNs.Based on these formulae,one can dominate the number,width and position of photonic bands within designed frequencies by adjusting the NCWS and MRWL.There would be potential applications for designing optical switches,optical narrow-band filters,dense wavelength-division-multiplexing devices and other correlative waveguide network devices.     

不同探针分子温敏漆的制备及性能对比研究

利用氯化铕(Eu Cl3)、苯甲酸(BA)、菲咯啉(Phen)和2,2′-联吡啶(Bipy)为原料合成了Eu(BA)_3Phen和Eu(BA)_3Bipy两种配合物,并将两种配合物分别掺入甲基丙烯酸甲酯(MMA)中,在过氧化苯甲酰(BPO)作用下引发聚合,获得不同探针分子的两种温敏漆Eu(BA)_3Phen/PMMA和Eu(BA)_3Bipy/PMMA。利用红外光谱、紫外吸收光谱和荧光光谱对两种探针分子及温敏漆的特性进行了表征,分析结果表明,探针分子Eu(BA)_3Phen的荧光强度明显强于Eu(BA)_3Bipy,相对应的两种温敏漆Eu(BA)_3Phen/PMMA与Eu(BA)_3Bipy/PMMA均有较好的温度猝灭特性,但是对比分析发现在25~35℃和35~45℃温度区间内温敏漆Eu(BA)_3Phen/PMMA的灵敏度较高,而在45~55℃和55~65℃温度区间内温敏漆Eu(BA)_3Bipy/PMMA的灵敏度较高,可见温敏漆在不同温度区间的测温灵敏度是不同的。     

不同探针分子温敏漆的制备及性能对比研究

利用氯化铕(EuCl₃)、苯甲酸(BA)、菲咯啉(Phen)和2, 2'-联吡啶(Bipy)为原料合成了Eu(BA)₃Phen和Eu(BA)₃Bipy两种配合物, 并将两种配合物分别掺入甲基丙烯酸甲酯(MMA)中, 在过氧化苯甲酰(BPO)作用下引发聚合, 获得不同探针分子的两种温敏漆Eu(BA)₃Phen/PMMA和Eu(BA)₃Bipy/PMMA。利用红外光谱、紫外吸收光谱和荧光光谱对两种探针分子及温敏漆的特性进行了表征, 分析结果表明, 探针分子Eu(BA)₃Phen的荧光强度明显强于Eu(BA)₃Bipy, 相对应的两种温敏漆Eu(BA)₃Phen/PMMA与 Eu(BA)₃Bipy/PMMA均有较好的温度猝灭特性, 但是对比分析发现在25~35 ℃和35~45 ℃温度区间内温敏漆Eu(BA)₃Phen/PMMA的灵敏度较高, 而在45~55 ℃和55~65 ℃温度区间内温敏漆Eu(BA)₃Bipy/PMMA的灵敏度较高, 可见温敏漆在不同温度区间的测温灵敏度是不同的。     

([Ru(bpy)_3]~(2+)-Eu(TTA)_3Phen)/PMMA温敏漆的制备及性能研究

合成了[Ru(bpy)3]2+和Eu(TTA)3Phen两种探针分子,并将两者与甲基丙烯酸甲酯(MMA)混合,在引发剂BPO作用下进行聚合,获得具有温度响应性能的([Ru(bpy)3]2+-Eu(TTA)3Phen)/PMMA温敏漆。采用IR、紫外吸收光谱和荧光光谱对探针分子的结构及温敏漆的荧光特性进行了表征。红外光谱和紫外吸收光谱表明:Ru与2,2'-联吡啶分子通过双氮配位,有O→Eu配位键形成。荧光光谱表明:温敏漆样品的温度猝灭性能较好,并且在不同温度范围内测温灵敏度不同,由452 nm激发时,温敏漆样品在25~45℃范围内测温灵敏度高,最强的荧光发射峰位于584 nm;由342 nm激发时,在45~65℃范围内测温灵敏度高,最强的荧光发射峰位于612 nm。