无缺陷十二边形光子准晶的定向辐射：漏波特性
Directive Emission from Defect-Free Dodecagonal Photonic Quasicrystals: A Leaky-Wave Characterization
摘要：
本文研究了由介质棒按12重对称非周期排列而成的二维有限尺寸光子准晶（PQC）平板中的埋源辐射。基于严格的全波模拟，我们的研究结果显示了在多个频率下实现宽边辐射的可能性，具有高方向性（例如，15 dB）和低旁瓣（例如，-12dB）。我们还表明，漏波支持的PQC板，和波束宽度是直接成正比的漏波衰减常数，这提供了一个物理上的深刻的解释所观察到的辐射特性。
英文摘要：
In this paper, we study the radiation from embedded sources in two-dimensional finite-size "photonic-quasicrystal" (PQC) slabs made of dielectric rods arranged according to a 12-fold symmetric aperiodic tiling. The results from our investigation, based on rigorous full-wave simulations, show the possibility of achieving broadside radiation at multiple frequencies, with high-directivity (e.g., 15 dB) and low-sidelobes (e.g., -12 dB). We also show that leaky waves are supported by a PQC slab, and that the beamwidth is directly proportional to the leaky-wave attenuation constant, which provides a physically-incisive interpretation of the observed radiation characteristics.
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