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The optical properties of photonic structures made with more than twomaterials are very interesting for optical filtering and lighting applications.Herein, we compared the transmission properties of one-dimensional photoniccrystals made with three, four and five materials, showing that, with aphotonic crystal made of t different materials, the band gap splits in t-1bands. The same optical thickness for the different materials layers results insplit photonic band gaps with the same intensity. Photonic crystals with morethan two materials result in a simple structure that could be used formulti-feature optical filters, or that could provide feedback formulti-emission distributed feedback lasers. Furthermore, we analyzed thetransmission properties of ternary and quaternary random photonic structures.These materials could very interesting for light trapping in photovoltaicdevices.

Disordered one-dimensional photonic structures composed by more than two materials with the same optical thickness