Fig. 6
From: Broadband Metallic Planar Microlenses in an Array: the Focusing Coupling Effect
a Simulation results of the focal length and FWHM of the microlenses in a 2 × 2 array as the diameter of lenses varying from 2 to 8 μm (a = 0 μm, λ = 0.6 μm). b The simulated electric-field intensity of the focal plane of the microlens array for d = 4 μm and the focusing patterns of A–A and B–B cross sections. c The simulated results of the focal plane for d = 8 μm and the focusing patterns of C–C and D–D cross sections