Figure 2. Confocal optical measurements, point-source calculations and FDTD simulations showed excellent agreement on focal length and depth of focus for a 5-μm patch.
z-linescans of measured and simulated 3D optical field maps for the patch in Fig. 1 are shown at (A) λ = 500 nm, (B) λ = 545 nm, (C) λ = 670 nm, and (D) λ = 780 nm.