The Talbot Effect

In diffractive optics, when a periodic structure is illuminated by collimated light, it is possible to observe the image of the periodic structure forming at periodic distances behind the object. This is the well-known Talbot effect (with the so-called Talbot distance describing the periodic intervals) which has seen regular application in e.g. lithography.

With the Field Tracing technology of the fast physical optics modeling and design software VirtualLab Fusion, this effect and its applications can be fully investigated. See the examples below, where we demonstrate the basic principles of the Talbot effect with linear and crossed patterns, and have a closer look at a particular lithography application to produce nanostructures.

Talbot Images of A Conical Phase Mask

A phase mask with a layer of cones is modeled rigorously in VirtualLab Fusion.
Different Talbot images are detected, with the pillar pattern reproduced in the primary image plane and the hole pattern in the secondary.

Modeling of the Talbot Effect

We demonstrate the modeling of the Talbot effect, a well-known near-field diffraction effect from periodic structures such as gratings.

Meet us at SPIE Photonics Europe

Meet us at SPIE Photonics Europe