Negative Propagation Effects in Two-Dimensional Silicon Photonic Crystals

Figure 8

Ray tracing illustration of the flat lens made of an isotropic homogeneous medium with index of refraction 𝑛=−1. 𝑑₁ is the distance between the source and the first interface, and 𝑑₂ is the distance between the image point and the second interface, d is the thickness of the slab. (a) 𝑑₁=𝑑/2, (b) 𝑑₁>𝑑/2, (c) 𝑑₁<𝑑/2, (d) source is placed inside of the slab.

(a)

(b)

(c)

(d)