Spectral control of 1-D photonic crystal

The forbidden band characteristics of photonic crystal provide a new technology for the study of spectral control of camouflage materials. This paper built the spectral transmi-ssion and reflection theoretical model of one-dimensional photonic crystal with transmission matrix. Aiming at the demand of high reflection in near infrared and low emission in middle-far infrared wavebands of camouflage materials, Ag, MgF2 and ZnS were optimized as thin-film materials of photonic crystal, and by the way of vacuum evaporation filming, Ag/MgF2, Ag/MgF2/ZnS 1-D photonic crystals with different periodical structures were prepared. Spectral reflection and transmission characteristics of these 1-D photonic crystals were studied experimentally. Experimental results show that the materials and periodical structures influence the spectral characteristics of 1-D photonic crystals and by optimum design the photonic crystal can realize the spectral characteristics in camouflage waveband.