title: Multiplexing complex two-dimensional photonic superlattices.
abstract: We introduce a universal method to optically induce multiperiodic photonic complex superstructures bearing two-dimensional (2D) refractive index modulations over several centimeters of elongation. These superstructures result from the accomplished superposition of 2D fundamental periodic structures. To find the specific sets of fundamentals, we combine particular spatial frequencies of the respective Fourier series expansions, which enables us to use nondiffracting beams in the experiment showing periodic 2D intensity modulation in order to successively develop the desired multiperiodic structures. We present the generation of 2D photonic staircase, hexagonal wire mesh and ratchet structures, whose succeeded generation is confirmed by phase resolving methods using digital-holographic techniques to detect the induced refractive index pattern.
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
mesh_terms: D004867:Equipment Design; D005583:Fourier Analysis; D006696:Holography / Q000295:instrumentation*; D017785:Photons; D012031:Refractometry / Q000295:instrumentation*