Fig. 2.
Cross-sectional view of Ez field distribution from full wave simulation results of different orders of modes inside a 3D subwavelength cavity made of indefinite metamaterials. (A) Perspective view of the cavity containing 4 × 4 silver nanowire array. The gray plane across the center of the cavity is where we obtain the field distribution of (2,1,1) mode in B. (C) The same cavity as in A, but the gray plane is parallel to the nanowires and showing where we obtain D)–(F. D–F are (2,1,1), (2,1,2), and (2,1,3) modes of the same cavity, respectively. These modes resonate at different frequencies. The field distributions are shown in false color, with red to blue colors representing positive to negative values.