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Gate-controlled mid-infrared light bending with aperiodic graphene nanoribbons array

机译:非周期性石墨烯纳米带阵列的门控中红外光弯曲

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摘要

Graphene plasmonic nanostructures enable subwavelength confinement of electromagnetic energy from the mid-infrared down to the terahertz frequencies. By exploiting the spectrally varying light scattering phase at the vicinity of the resonant frequency of the plasmonic nanostructure, it is possible to control the angle of reflection of an incoming light beam. We demonstrate, through full-wave electromagnetic simulations based on Maxwell equations, the electrical control of the angle of reflection of a mid-infrared light beam by using an aperiodic array of graphene nanoribbons, whose widths are engineered to produce a spatially varying reflection phase profile that allows for the construction of a far-field collimated beam towards a predefined direction.
机译:石墨烯等离子体纳米结构可实现从中红外到太赫兹频率的亚波长限制电磁能。通过在等离子体纳米结构的共振频率附近利用光谱变化的光散射相位,可以控制入射光束的反射角。通过基于Maxwell方程的全波电磁仿真,我们演示了通过使用石墨烯纳米带的非周期性阵列对中红外光束的反射角进行电控制,该石墨烯纳米带的宽度经过设计可产生空间变化的反射相轮廓这样就可以朝预定方向构造远场准直光束。

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