title: Photonic ratchet superlattices by optical multiplexing.
abstract: We present a method based on incremental holographic multiplexing to create a refractive index ratchet distribution into a photorefractive crystal as an example for the generation principle of such complex multiperiodic lattices. The implemented technique follows a finite optical series expansion of the desired index modulation. To analyze the induced lattice, we determine the phase retardation of a probe beam at the back face of the crystal by digital holography analysis. Our result depicts a first example to optically explore the fascinating phenomena of ratchet resembling systems.
authors.affiliation: Institut für Angewandte Physik and Center for Nonlinear Science (CeNoS), Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany. martin.boguslawski@uni‑muenster.de
authors.forename: Martin
authors.initials: M
authors.lastname: Boguslawski
authors.forename: Andreas
authors.initials: A
authors.lastname: Kelberer
authors.forename: Patrick
authors.initials: P
authors.lastname: Rose
authors.forename: Cornelia
authors.initials: C
authors.lastname: Denz