Control of pattern formation in a single feedback system by photonic bandgap structures

N. Marsal; G. Montemezzani; M. Sciamanna; D. Wolfersberger; D. N. Neshev

doi:10.1117/12.780969

21 April 2008 Control of pattern formation in a single feedback system by photonic bandgap structures

N. Marsal, G. Montemezzani, M. Sciamanna, D. Wolfersberger, D. N. Neshev

Proceedings Volume 6989, Photonic Crystal Materials and Devices VIII; 69890S (2008) https://doi.org/10.1117/12.780969
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.780969

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KEYWORDS

Crystals

Mirrors

Modulation

Laser crystals

Control systems

Photonic crystals

Beam splitters

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