Figure 1

(Color) (a) The band structure of a square lattice of air holes embedded in the dielectric medium $ϵ=12$. The lattice constant is $a$ and the radius of the cylinders is $0.35a$. $\Gamma M$ and $\Gamma X$ denote the [11] and [10] directions, respectively, (b) the magnetic field $H_z$ of a point source and its image across a photonic crystal slab called superlens in Luo et al. (Ref. 3). The slab measures $11.31\times 31.11$, and the frequency is 0.192. (c) the conceptual layout of a superlensing phenomenon, adapted from Veselago (Ref. 2) and Pendry (Ref. 1); (d) the illustration of negative refraction which would be expected for a plane wave across a flat slab, by analogy with the right-hand side of Fig. 2 in Ref. 3.Reuse & Permissions

Figure 2

(Color) The intensity image of the magnetic fields across a flat photonic crystal slab made of air holes in dielectric $ϵ=12$. The principle directions of the crystal are shown in the figure, as [11] and [10]. A Gaussian beam is incident to the slab with various incident angles in degrees with respect to the [11] direction: (a) 0; (b) 22.5; (c) 45; and (d) 67.5. The slab measures as $49.5\times 92$ in terms of lattice constant. For clarity, the air holes are not shown in the figure.Reuse & Permissions

Figure 3

(Color) The intensity image of the magnetic fields across a flat photonic crystal slab. The principle directions of the crystal are shown in the figure, as [11] and [10]. The [11] direction is tilted towards the left by an angle of $22.5°$ with reference to the normal direction of the slab surface. A Gaussian beam is incident to the slab with various incident angles in degrees with respect to the normal direction of the slab surface: (a) 0; (b) 22.5; (c) 45; and (d) $-22.5$. The slab measures as $49.5\times 92$ in terms of lattice constant.Reuse & Permissions

Figure 4

(Color) The intensity image of the magnetic fields across two flat photonic crystal slabs. The principle directions of the crystal are shown in the figure, as [11] and [10]. The two slabs measure in terms of lattice constant as (a) $70\times 92$; (b) $49.5\times 120$. A Gaussian beam is incident to the slab with the incident angle of $22.5°$ with respect to the normal direction of the slab surface.Reuse & Permissions

Figure 5

(Color) The intensity image of the magnetic fields across a flat photonic crystal slabs. The principle directions of the crystal are shown in the figure, as [11] and [10]. The slab measures in terms of lattice constant as $99\times 184$. A Gaussian beam is incident to the slab with the incident angle of $22.5°$ with respect to the normal direction of the slab surface. The beam width amounts to 70 lattice constant.Reuse & Permissions