Phys. Rev. B 55, 15345–15348 (1997)Group-theoretical classification of eigenmodes in three-dimensional photonic lattices
General relations concerned with the irreducible representations of the radiation field in arbitrary three-dimensional photonic lattices are derived. Based on this relation, an efficient method for the mode assignment that excludes unphysical quasilongitudinal eigenmodes is presented. This method is applied to a simple cubic lattice with Oh symmetry as an example, and its uncoupled modes that cannot be excited by an incident plane wave are identified. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.55.15345
DOI:
10.1103/PhysRevB.55.15345
PACS:
78.66.Nk, 03.50.De, 02.20.Df
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