Fabbricazione di strutture attive a cristallo fotonico ad alta efficienza quantica

In this work the formation of Er3+ 3D photonic crystal (PhC) in inverse opal configuration is described. Scanning electron microscope showed that the inverse opals possess a fcc structure with an air hollows of about 210 nm. A pseudo photonic band gap, in the visible range, was observed from reflectance measurements. Spectroscopic properties of Er3+- activated silica inverse opal, in the region 4I13/2 ? 4I15/2, were investigated by luminescence spectroscopy. A 4I13/2 level decay curve presents a single-exponential profile, with a measured lifetime of 18 ms, corresponding a high quantum efficiency of the system.