The Photonic Band theory and the negative refraction experiment of metallic helix metamaterials

Details The Photonic Band theory and the negative refraction experiment of metallic helix metamaterials The Photonic Band theory and the negative refraction experiment of metallic helix metamaterials

2010-06-08

arxiv.org/abs/1006.1589v2

Phys. Rev. Lett. 105 (2010)247401

Physics

Optics

Scientific paper

10.1103/PhysRevLett.105.247401

We develop a theory to compute and interpret the photonic band structure of a periodic array of metallic helices for the first time. Interesting features of band structure include the ingenuous longitudinal and circularly polarized eigenmodes, the wide polarization gap [Science 325, 1513 (2009)], and the helical symmetry guarantees the existence of negative group velocity bands at both sides of the polarization gap and band crossings pinned at the zone boundary with fixed frequencies. A direct proof of negative refraction via a chiral route [Science 306, 1353 (2004)] is achieved for the first time by measuring Gooshanchen shift through a slab of three dimensional bona fide helix metamaterial.

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