Fig. 10: Example of superoscillatory spot constructed from band-limited CPSWFs φn(c,r), where c = 2πD/λ, the cut-off frequency is 2π/λ and the FOV is D = λ/2.
From: Superoscillation: from physics to optical applications
a The 2D intensity distribution of the constructed superoscillatory spot that is surrounded by very large sidebands; b A magnified image of the intensity-constructed superoscillatory spot; c The intensity distribution curve (blue) and phase distribution curve (red) in the radial direction: the inset presents the intensity distribution curve within the FOV [−D, D], which shows an FWHM of 0.2λ
