Control of pattern formation in a single feedback system by photonic bandgap structures
Identifieur interne : 009752 ( Main/Merge ); précédent : 009751; suivant : 009753Control of pattern formation in a single feedback system by photonic bandgap structures
Auteurs : N. Marsal [France] ; G. Montemezzani [France] ; M. Sciamanna [France] ; D. Wolfersberger [France] ; D. N. Neshev [Australie]Source :
- Proceedings of SPIE - The International Society for Optical Engineering [ 0277-786X ] ; 2008.
Descripteurs français
- Pascal (Inist)
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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.
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Barium titanates</term>
<term>Dissipative system</term>
<term>Feedback</term>
<term>Mirrors</term>
<term>Modulation instability</term>
<term>Periodic structures</term>
<term>Photonic band gap</term>
<term>Photonic crystals</term>
<term>Photorefractive crystal</term>
<term>Ternary compounds</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Instabilité modulation</term>
<term>Miroir</term>
<term>Boucle réaction</term>
<term>Bande interdite photonique</term>
<term>Structure périodique</term>
<term>Cristal photonique</term>
<term>Composé ternaire</term>
<term>Titanate de baryum</term>
<term>Système dissipatif</term>
<term>Cristal photoréfractif</term>
<term>BaTiO3</term>
<term>Ba O Ti</term>
<term>0130C</term>
<term>4270Q</term>
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<front><div type="abstract" xml:lang="en">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 BaTiO<sub>3</sub>
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.</div>
</front>
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<tree><country name="France"><noRegion><name sortKey="Marsal, N" sort="Marsal, N" uniqKey="Marsal N" first="N." last="Marsal">N. Marsal</name>
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