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[摘要]：The local perturbation method has been applied to investigate wave propagation in a homogeneous medium with an arbitrary number of local perturbations (LP), which are characterized by a time and spatial dispersion giving rise to the occurrence of several types of waves. The equation for propagating waves has been formulated and solved. The eigen frequencies of a medium with one or two local perturbations, the temporal attenuation of the eigen oscillations and the spectrum of photon crystals with two LPs in cell are obtained. |
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