Figure 3
From: Diffraction Interference Induced Superfocusing in Nonlinear Talbot Effect
Recorded images of the SH patterns with a conventional optical microscope at different Talbot planes.
The images shown here are all formed within one Talbot length. (a) and (b) are close to the sample surface. (c) is the SH pattern at 1/2 Talbot plane, which is laterally shifted by half a period in comparison with the primary SH self-image, (f), at the first Talbot plane. Periodic focusing spots can be observed in most of the imaging planes. At certain planes (see (e)), however, the focusing spots disappear because of destructive interference of the SH waves.
