Figure 4

Detecting performance of the HPEDL in two-dimensional simulations. The simulations are performed at a nominal wavelength of λ₀ = 680 nm and the thickness of the HPEDL is 320 nm (d ₁ = 160 nm, d ₂ = 160 nm). (a,b,c) A PMMA strip with 200 nm width that embedded in the PC substrate. (a) Simulated electric-field distribution |E _z | for detecting the PMMA strip with 200 nm width. (b,c) The line profiles of (b) |E _z | and (c) |E _x | at the observation plane. The case of the perfect lens is shown for comparison. (d–f) PMMA strips with different widths: 120 nm, 80 nm and 40 nm. (d) Simulated electric-field distribution |E _z | for detecting PMMA strip with 120 nm width. (e,f) The line profiles of (e) |E _z | and (f) |E _x | at the observation plane. (g,h,i) Two PMMA strips with 20 nm width and a center-to-center separation of 200 nm. (g) Simulated electric-field distribution |E _z | for detecting two PMMA strips with 20 nm width 20 nm and a center-to-center separation of 200 nm. (h,i) The line profiles of (h) |E _z | and (i) |E _x | at the observation plane. The case of the perfect lens is shown for comparison.