Schematic illustration of a compound hole array with two different subwavelength rectangular holes A and B in each unit cell in a PEC film.
Transmission intensity and phase difference at normal incidence for different arrangements of compound subwavelength rectangular hole arrays in PEC films with thickness , where each unit cell consists of two different rectangular holes A and B. The solid line in each plot corresponds to the transmission intensity and the dotted line corresponds to the phase difference between different holes in a unit cell. The periods of the four compound hole arrays are all , and other identical parameters are , while the changeable parameters are: (a) , (b) , (c) , and (d) .
Schematic illustration of the compound rectangular hole arrays, where only a unit cell is shown for each array. [(a)–(d)] A unit cell consists of two, three, four, and five identical rectangular holes, respectively.
Transmission intensity and phase difference for compound hole arrays corresponding to the geometrical structures in Fig. 3. The solid line in each plot corresponds to the transmission intensity. The dotted line and the dashed line [only in Fig. 4(d)] correspond to the phase difference between the adjacent holes in a unit cell. All the holes have the identical size , and the hole arrays have the identical periods , thickness , and separation between adjacent holes . The only difference is the number of holes in a unit cell.
Transmission intensity for special arrangements of three-sublattice compound arrays of rectangular hole of size in PEC films with thickness . The periods of these compound hole arrays are all . The separations between adjacent holes in a unit cell and are identical but changeable, and the values are labeled in the figure.
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