Omnidirectionally Bending to the Normal in epsilon-near-Zero Metamaterials

Details Omnidirectionally Bending to the Normal in epsilon-near-Zero Metamaterials Omnidirectionally Bending to the Normal in epsilon-near-Zero Metamaterials

2011-12-07

arxiv.org/abs/1112.1482v1

Physics

Optics

Scientific paper

Contrary to conventional wisdom that light bends away from the normal at the interface when it passes from high to low refractive index media, here we demonstrate an exotic phenomenon that the direction of electromagnetic power bends towards the normal when light is incident from arbitrary high refractive index medium to \epsilon-near-zero metamaterial. Moreover, the direction of the transmitted beam is close to the normal for all angles of incidence. In other words, the electromagnetic power coming from different directions in air or arbitrary high refractive index medium can be redirected to the direction almost parallel to the normal upon entering the \epsilon-near-zero metamaterial. This phenomenon is counterintuitive to the behavior described by conventional Snell's law and resulted from the interplay between \epsilon-near-zero and material loss. This property has potential applications in communications to increase acceptance angle and energy delivery without using optical lenses and mechanical gimbals.

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