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基于折线形手征负折射介质结构的设计与仿真
Design and simulation of chiral negative refractive structure based on folded-wire
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摘要: 分别设计和仿真了一种新型的工作在微波段和光波段的折线形手征介质结构.利用仿真得到的透射系数和反射系数反演计算了该结构的旋光角、椭偏度、相对介电常数、相对磁导率、手征参数以及折射率等参数.结果表明该结构在这两种波段下都显示出极大的旋光角和椭偏度,且因具有大的手征参数,而不再需要介电常数和磁导率同时为负就可实现左旋圆极化波（LCP）和右旋圆极化波（RCP）的负折射率.Abstract: A new chiral structure working in microwave and optical frequency bands based on folded-wire is designed and simulated.Effective parameters of this structure,including polarization azimuth rotation angle,ellipticity angle,relative permittivity,relative permeability,chiral parameter and refractive index are obtained from simulated transmission and reflection spectra.The results show that the exceptionally strong polarization azimuth rotation angle and the ellipticity angle are found in microwave and optical frequency bands.Because this structure has a large chiral parameter,negative refractive index of a circularly polarized wave can be obtained without requiring permittivity and permeability to be negative simultaneously.
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