Figure 2
From: Nanoslot metasurface design and characterization for enhanced organic light-emitting diodes

(a) OCE and the luminous reflectance while the thickness of CPL and MS is varied in the range of 20–100 nm. L1, L2, and W are fixed to 240, 160, and 110 nm, respectively. (b) Optimization factor (γ) of MIB-OLED (in blue) and conventional B-OLED (in gray) with respect to the thickness of CPL and MS in the range of 20–100 nm. (c) OCE and the luminous reflectance with respect to L2 and W. L2 and W are varied, respectively, in the range of 120–220 nm and 60–110 nm. (d) Optimization factor (γ) of the MIB-OLED (in red) and the conventional B-OLED (in gray). dCPL, dMS, and L1 are fixed at 40, 20, and 240 nm. Due to the lack of MS in conventional B-OLED, γ remains as constant for conventional B-OLED along the dMS axis. Power flow of MIB-OLEDs: (e) spatial distribution in the zx plane for MS with L1 = 240 nm, L2 = 160 nm, W = 110 nm, dMS = 100 nm, and dCPL = 100 nm assuming horizontal dipole emission at y = 0. The parameter set is in (a) marked with a green star symbol. (f) For optimum MS with L1 = 240 nm, L2 = 220 nm, W = 60 nm, dMS = 20 nm, and dCPL = 40 nm, as marked in (c) with a red star symbol. (g) Spatial distribution in the xy plane by external light incidence (λ = 550 nm) for MS with L1 = 240 nm, L2 = 160 nm, W = 110 nm, dMS = 20 nm, and dCPL = 100 nm, as marked in (c) with a blue star symbol, and (h) for the same optimum MS marked with a red star symbol in (c).