Carrasco Eduardo, Tamagnone Michele, Mosig Juan R, Low Tony, Perruisseau-Carrier Julien
Adaptive MicroNano Wave Systems, Ecole Polytechnique Federale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
Nanotechnology. 2015 Mar 27;26(13):134002. doi: 10.1088/0957-4484/26/13/134002. Epub 2015 Mar 11.
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.
石墨烯等离子体纳米结构能够将电磁能量从红外中波段到太赫兹频率进行亚波长限制。通过利用等离子体纳米结构共振频率附近光谱变化的光散射相位，可以控制入射光束的反射角。我们基于麦克斯韦方程组通过全波电磁模拟证明，使用石墨烯纳米带的非周期阵列可以对中红外光束的反射角进行电控制，其宽度经过设计以产生空间变化的反射相位分布，从而能够朝着预定义方向构建远场准直光束。
