- Mirage and superbending effect in two-dimensional graded photonic crystals doi link

Auteur(s): Centeno Emmanuel(Corresp.), Cassagne D., Albert Jean-paul

(Article) Publié: Physical Review B, vol. 73 p.235119 (2006)

Ref HAL: hal-00437540_v1
DOI: 10.1103/PhysRevB.73.235119
WoS: 000238696600047
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We present a study of graded photonic crystals presenting a mirage effect. This light bending is understood through parametric studies of the isofrequency curves. We derive a model based on the effective index computation and on the Eikonal equation in order to demonstrate that photonic mirages originate from the same physical principles as atmospheric mirages. A graded photonic crystal presenting a superbending effect is proposed for designing a bent waveguide.