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21 April 2008 Control of pattern formation in a single feedback system by photonic bandgap structures
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We present the observation of the manipulation of modulational instability in a nonlinear dissipative system by a periodic photonic lattice. We use a setup based on a photorefractive BaTiO3 crystal in a single feedback mirror configuration leading to the formation of hexagonal patterns. Additionally, we impose an optical lattice to induce one or two-dimensional photonic band-gap structures with variable parameters. We show that by varying the lattice periodicity, thus adjusting the transverse spatial frequencies associated to the bandgap, we can induce patterns of particular symmetry or suppress the modulational instability when the position of the lattice bandgap coincides with the instability gain.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
N. Marsal, G. Montemezzani, M. Sciamanna, D. Wolfersberger, and D. N. Neshev "Control of pattern formation in a single feedback system by photonic bandgap structures", Proc. SPIE 6989, Photonic Crystal Materials and Devices VIII, 69890S (21 April 2008);


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