【摘 要】
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An efficient numerical method is developed for computing the band structures of two-dimensional photonic crystals which are honeycomb lattices of circular cylinders.Using the Dirichlet-to-Neumann(DtN)
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An efficient numerical method is developed for computing the band structures of two-dimensional photonic crystals which are honeycomb lattices of circular cylinders.Using the Dirichlet-to-Neumann(DtN)map of the unit cell which consists of three hexagons,the problem can be formulated as a linear eigenvalue problem for relatively small matrices,where the eigenvalue is a function of the Bloch wave vector and the frequency is a given parameter.
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