Negative Propagation Effects in Two-Dimensional Silicon Photonic Crystals

Figure 9

Imaging of a point source by a slab of 2D PhC of hexagonal lattice. The interface is normal to the Γ-M direction, and the normalized frequency is 𝜔=0.315(2𝜋𝑐/𝑎). The distance between the source and the first interface is 𝑑₁, the distance between the image and the second interface is 𝑑₂, and the thickness of the slab is 𝑑=8×√3𝑎. (a) 𝑑₁<𝑑/2, (b) 𝑑₁=𝑑/2, (c) 𝑑₁>𝑑/2.

(a)

(b)

(c)