Modulation of photonic band structures with dielectric anisotropy
Surface Physics Laboratory, Fudan University, Shanghai, 200433, P.R. China
2 Department of Physics, Fudan University, Shanghai, 200433, P.R. China
Revised: 28 August 2006
Published online: 16 October 2006
By the multiple scattering method and the extended Mie theory, we have calculated the photonic band structure of the photonic crystals consisting of the dielectric spheres with uniaxial/biaxial anisotropy. The results demonstrate that for fcc lattice structure there exist two partial photonic band gaps which does not appear in the isotropic case. Among them, the lower one, lying between the second and the third bands, exists in one third of the first Brillouin zone, while the upper one, opening between the fourth and fifth bands, can appear simultaneously in the rest two thirds of the first Brillouin zone. The effects of anisotropy on the band structures are studied as well, which suggests the biaxial anisotropy are much more flexible than the uniaxial anisotropy in modulating the band structures.
PACS: 42.70.Qs – Photonic bandgap materials / 42.25.Fx – Diffraction and scattering / 42.25.-p – Wave optics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006