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Article Dans Une Revue Physical Review Letters Année : 2004

Bloch Modes Dressed by Evanescent Waves and the Generalized Goos-Hänchen Effect in Photonic Crystals

Didier Felbacq
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Rafik Smaâli
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Résumé

It is common knowledge that in an infinite periodic medium, for instance, an infinite photonic crystal, the direction of propagation of a monochromatic wave packet is given by the normal to the isofrequency diagram. We show that this is no longer true in a finite size medium, due to the existence of evanescent waves near the interfaces of the photonic crystal. We derive a renormalized isofrequency diagram giving the correct direction. We give a physical interpretation, showing that this phenomenon can be considered as a generalized Goos-Ha ¨nchen effect.
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Dates et versions

hal-04047671 , version 1 (27-03-2023)

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Didier Felbacq, Rafik Smaâli. Bloch Modes Dressed by Evanescent Waves and the Generalized Goos-Hänchen Effect in Photonic Crystals. Physical Review Letters, 2004, 92, ⟨10.1103/physrevlett.92.193902⟩. ⟨hal-04047671⟩
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