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计算了由正负折射率材料交替排列组成的一维光子晶体的能带及电场,发现其能带不同于由普通正折射率材料组成的光子晶体的能带.当选择合适的参数时,由正负折射率材料组成的光子晶体的TE模或TM模有完全光子带隙出现,这在普通光子晶体中不出现.导带中的电场波函数与普通光子晶体相比具有很强的局域性.对于负折射率材料层为色散介质的情况,计算了在不同的具有正负折射率区域能带.
The band and electric field of one-dimensional photonic crystals composed of alternating materials of positive and negative refractive index were calculated and found to have different energy bands from those of photonic crystals composed of normal positive refractive index material. When selecting the appropriate parameters, The TE mode or TM mode of the photonic crystal composed of positive and negative refractive index material has a complete photonic bandgap which does not appear in ordinary photonic crystals. The electric field wavefunction in the conduction band has a strong local area compared with the ordinary photonic crystal For the case where the layer of negative index material is a dispersive medium, the band at different zones with positive and negative indices is calculated.