Guo Yinghui, Yan Lianshan, Pan Wei, Luo Bin
Opt Express. 2015 Oct 19;23(21):27566-75. doi: 10.1364/OE.23.027566.
A dual-metasurface-based reflective device ("meta-mirror") has been proposed for broadband polarization manipulation, which is composed of orthogonal metallic cut-wire arrays separated from a grounded plane with different distances. The reflective phases of orthogonally linearly-polarized components can be independently adjusted by changing the dimensions of the cut-wire pairs. Benefiting from the fully released dispersion management ability in both dimensions, achromatic (i.e., ultra-broadband) polarization manipulation can be achieved. The suggested approach has been numerically verified in both microwave and optical band. Moreover, experimental characterization in microwave regime has demonstrated the broadband polarization manipulation ability within 5 - 30 GHz. The underlying physical mechanism of dispersion engineering was explained in general equivalent circuit theory and transmission line model.
一种基于双超表面的反射器件（“超表面镜”）已被提出用于宽带偏振操纵，它由与接地平面以不同距离隔开的正交金属切割线阵列组成。通过改变切割线对的尺寸，可以独立调整正交线偏振分量的反射相位。受益于在两个维度上完全释放的色散管理能力，可以实现消色差（即超宽带）偏振操纵。所提出的方法已在微波和光学频段进行了数值验证。此外，在微波频段的实验表征证明了在5 - 30 GHz范围内的宽带偏振操纵能力。色散工程的潜在物理机制在一般等效电路理论和传输线模型中得到了解释。
