Multiple photonic band gaps in the structures composed of core-shell particles

We present a detailed study of the full photonic band gaps for the spherical multilayered core-shell particles arranged in bcc, fcc, and diamond fcc lattices. We find that layered structure of the particles does not lead to an increase of the gap width in case of the fcc arrangement. On the other hand full photonic band gap opens up for the bcc lattice composed of such particles. The most promising is the diamond fcc arrangement. For such ordering of core particles covered by a thin shell we find three reasonably wide gaps.