Periodic Distribution of Planar Defects in Colloidal Photonic Crystals


  • We thank S. Reculusa for useful discussions, B. Agricole and E. Sellier for Langmuir–Blodgett and SEM experiments, respectively.


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Colloidal photonic crystals containing one to four periodically embedded planar defect layers are fabricated (see figure). It appears that the fabrication of such periodic superlattices leads to a redistribution of the photonic density of states, resulting in the opening of new bands and gaps in the photonic band structure, in comparison with defect-free opals.