Abstract: We proposed a new onedimensional variable frequency photonic crystals (VFPCs), and gave the expression of transmission matrix and electric field distribution. On this basis, we calculated transmissivity and the electric field distribution of onedimensional VFPCs and studied the effect of variable frequency function, variable frequency medium refractive index, thickness, period numbers and defect layer on the transmissivity and the electric field distribution of the VFPCs. The results show that the photonic band gap of the VFPCs is wither than that of the conventional photonic crystals.

Key words: onedimensional variable frequency photonic crystal; transmissivity, electric field distribution