Figure 1

The structure diagram and nanocavity mode of the PC L3 nanocavity. (a) Cross section on the central plane (z = 0 plane) of the PC L3 nanocavity. Gray region is the dielectric slab, and white regions are the air holes. A, B, and C denote the displacements of the first, second, and third nearest pair of air holes, respectively. The air holes are moved outward along the x direction, denoted by the arrows. (b, c) E _y component of the electric field E _c (r) of the PC L3 nanocavity mode with the air hole displacements A = 0.2a, B = 0.025a, and C = 0.2a (b) on z = 0 plane and (c) on y = 0 plane, respectively. The electric field distribution is normalized by the electric field maximum at the center of the nanocavity r_0m= (0, 0, 0). The two dotted lines denote the top and bottom surfaces of the slab.