Floquet's Unit Cell Design for Periodic Structures at Optical Frequencies

Figure 7

Floquet’s resonance condition (passband condition) for different unit cell numbers 𝑚. The passband condition is below the dashed line: in this case, 𝑟=2, 𝑍^′₀=2, 𝑍₀=1, and 𝜃^′=𝜃.