聚苯乙烯微粒光子晶体的反常透过特性

The abnormal transmittance of polystyrene photonic crystals

在实验上发现了 3μm聚苯乙烯 (PS)小球光子晶体在 35 0nm至 90 0nm波长上的透过率的周期扰动 .根据透过率曲线的周期扰动的峰谷值判断 ,这种周期性透过率特性是基于PS小球的whispering gallery mode(WGM)共振 ,而不是源于米氏散射或布拉格衍射 .实验表明 ,周期性排列小球在非带隙区域对光的传输同样有一定的影响 .

The periodic disturbance in transmittance of the polystyrene photonic crystal with a diameter of 3mum is observed in our experiment. According to the peak-to-peak intervals of the periodic disturbance, it can be seen that the periodic disturbance does not come from Mie scattering or Bragg diffraction, but from the propagation of whispering gallery mode in polystyrene spheres. The results show new potential applications of phtonic crystals.