Sh. Fan et al., LARGE OMNIDIRECTIONAL BAND-GAPS IN METALLODIELECTRIC PHOTONIC CRYSTALS, Physical review. B, Condensed matter, 54(16), 1996, pp. 11245-11251
Using a finite-difference time-domain method, we study the band-struct
ure and transmission properties of three-dimensional metallodielectric
photonic crystals. The metallodielectric crystals are modeled as perf
ect electrical conducting objects embedded in dielectric media. We inv
estigate two different lattice geometries: the face-centered-cubic (fe
e) lattice and the diamond lattice. Partial gaps are predicted in the
fee lattice, in excellent agreement with recent experiments. Complete
gaps are found in a diamond lattice of isolated metal spheres. The gap
s appear between the second and third bands and their sizes can be lar
ger than 60% when the radius of the spheres exceeds 21% of the cubic u
nit cell size. A possible fabrication scheme for this structure is pro
posed and transmission calculations are performed.