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Experimental and theoretical observations of the slow-light effect on a tunable photonic crystal

2007; Optica Publishing Group; Volume: 24; Issue: 6 Linguagem: Inglês

10.1364/josab.24.001416

1520-8540

M. Roussey, Fadi I. Baida, Maria-Pilar Bernal,

Photorefractive and Nonlinear Optics

We describe how the susceptibility of a nonlinear material, such as lithium niobate, can change when the material is nanostructured. Indeed, we show, by the calculation of the local-field factor inside a photonic crystal, a significant augmentation of the susceptibility, especially at the edges of the photonic bandgap. In addition, and for the case of lithium niobate, we observe an increase of the second-order nonlinear coefficient. The experimental realization of an electro-optic tunable photonic crystal, based on a square lattice of holes, shows that the measured phenomenon completely agrees with the theoretical predictions.