title: Instability threshold of a photorefractive pattern-forming system.
abstract: We report on the detailed experimental determination of the threshold for modulational instability in a photorefractive single-mirror feedback system using a Fourier control technique. Results are compared to analytical predictions and a disagreement for the experimentally significant multiple pattern region is found. Implications for the generation of nonhexagonal two-dimensional patterns are discussed.
authors.affiliation: Institute of Applied Physics, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany. okamp@uni-muenster.de
authors.forename: Oliver
authors.initials: O
authors.lastname: Kamps
authors.forename: Philip
authors.initials: P
authors.lastname: Jander
authors.forename: Cornelia
authors.initials: C
authors.lastname: Denz