Instability threshold of a photorefractive pattern-forming system.
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.
Kamps
Oliver
O
Institute of Applied Physics, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany. okamp@uni-muenster.de
Jander
Philip
P
Denz
Cornelia
C