Photonic Band Gap materials are periodic dielectric structures that forbid propagation of electromagnetic waves in a certain frequency range and direction. It could be one of key components in future optical switching circuits and quantum computers. There are a lot of techniques to made a crystal: photolithography, nanoparticles sedimentation between ordered polymer spheres, direct spheres sedimentation, etc.
At the Department of Materials Sciences, we are preparing a promising zinc oxide-based samples. It could be formed by ZnSO4 hydrolysis at the presence of ethylene glycol. Process optimization include microwave burst heating, nanonucleus synthesis, and vacuum evaporation. While there are a lot ot things to be done here, some interesting results are already obtained. You could check our SEM photos presented here.
We have already acheive an uniform particle sizes and now working on close-to-FCC packing on a polished silica glass and Si <1 1 1> surfaces.
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