Figure 2
From: Planar super-oscillatory lens for sub-diffraction optical needles at violet wavelengths
Transverse electric field intensity profiles.
(a–c), Experimentally recorded and (d-f) theoretically calculated diffraction patterns at the propagation distances of z = 9 µm (top row), 10 µm (middle row) and 11 µm (bottom row) within the generated optical needle. The contrastive line-scan distributions along the horizontal line across the focal spot center are shown in (g) to (i) respectively.
