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arXiv 1102.5406physics.optics
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低折射率对比准晶体光子带隙的各向同性特性

Isotropic properties of the photonic band gap in quasicrystals with low-index contrast

Priya Rose, E. Di Gennaro, G. Abbate, A. Andreone

摘要:

我们报道了二维8-,10-和12-重对称低折射率对比准晶晶格中光子带隙的形成和发展。在微波区研究和测量了由介质圆柱杆制成的有限尺寸结构,并将其性能与传统的六方晶体进行了比较。通过改变入射光束在晶体内的传播方向,研究了带隙特性。为了研究带隙的各向同性性质,使用从0 \degree到30 \degree的各种入射角。非周期性有序结构的任意高旋转对称性可以实际地用于制造各向同性带隙材料,其非常适合于承载波导或腔。

英文摘要:

We report on the formation and development of the photonic band gap in two-dimensional 8-, 10- and 12-fold symmetry quasicrystalline lattices of low index contrast. Finite size structures made of dielectric cylindrical rods were studied and measured in the microwave region, and their properties compared with a conventional hexagonal crystal. Band gap characteristics were investigated by changing the direction of propagation of the incident beam inside the crystal. Various angles of incidence from 0 \degree to 30\degree were used in order to investigate the isotropic nature of the band gap. The arbitrarily high rotational symmetry of aperiodically ordered structures could be practically exploited to manufacture isotropic band gap materials, which are perfectly suitable for hosting waveguides or cavities.

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