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Light generation at the anomalous dispersion high energy range of a nonlinear opal film

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Autor: Botey, Muriel
Molinos Gómez, Alberto
Dorado, Luis A.
Depine, Ricardo A.
Lozano, Gabriel
Martorell, Jordi
Mihi, Agustín
Maymó, Marc
Míguez García, Hernán Ruy
Fecha: 2009
Publicado en: Optics Express, 17 (15), 12210-12216.
Tipo de documento: Artículo
Resumen: We study experimentally and theoretically light propagation and generation at the high energy range of a close-packed fcc photonic crystal of polystyrene spheres coated with a nonlinear material. We observe an enhancement of the second harmonic generation of light that may be explained on the basis of amplification effects arising from propagation at anomalous group velocities. Theoretical calculations are performed to support this assumption. The vector KKR method we use allows us to determine, from the linear response of the crystal, the behavior of the group velocity in our finite photonic structures when losses introduced by absorption or scattering by defects are taken into account assuming a nonzero imaginary part for the dielectric constant. In such structures, we predict large variations of the group velocity for wavelengths on the order or smaller than the lattice constant of the structure, where an anomalous group velocity behavior is associated with the flat bands of the ph...
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Cita: Botey, M., Molinos Gómez, A., Dorado, L.A., Depine, R.A., Lozano, G., Martorell, J.,...,Míguez García, H.R. (2009). Light generation at the anomalous dispersion high energy range of a nonlinear opal film. Optics Express, 17 (15), 12210-12216.
Tamaño: 256.1Kb
Formato: PDF

URI: https://hdl.handle.net/11441/73221

DOI: 10.1364/OE.17.012210

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