The normalized propagation constant, which determines the number of the modes and mode cutoff is obtained for a PCF: with a certain structure parameters.
对于给定结构的PCF，计算得到了决定模式数量及模式截止的归一化传播常数。
The propagation constant increases with decreasing slab thickness for the first-order oscillating mode, which is different from that in traditional metal-cladding waveguides.
一阶振荡导模的传播常数随着平板厚度的减小而增加，此性质与传统的金属包覆波导不同。
The propagation constant increases with decreasing slab thickness for the first-order oscillating mode, which is different from that in traditional metal-cladding waveguides.
一阶振荡导模的传播常数随着平板厚度的减小而增加，此性质与传统的金属包覆波导不同。
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