Photonic band structure in the nearly plane wave approximation
Department of Physics, Northwestern University, Evanston, IL 60208-3112, USA
2 Department of Physics, The Rockfeller University, 1230 York Avenue, New York, NY 10021-6399, USA
Published online: 15 June 1999
For photons propagating in a periodic dielectric lattice, the dispersion curve forms photonic bands separated by forbidden gaps. When the dielectric lattice deviates only slightly from being homogenous, the photonic band structure resembles the linear dispersion relation for photons folded into the first Brillouin zone, i.e., the so-called empty lattice bands. Using group theoretical technique, we calculate the splitting of the accidental degeneracies in the empty lattice bands at symmetry points for a simple cubic dielectric lattice.
PACS: 71.15.-m – Methods of electronic structure calculations / 78.20.-e – Optical properties of bulk materials and thin films
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999