论文标题
具有自旋选择相调制的阻抗匹配的圆极化选择表面的设计和实验证明
Design and experimental demonstration of impedance-matched circular polarization selective surfaces with spin-selective phase modulations
论文作者
论文摘要
本文介绍了阻抗匹配的圆极化选择表面的设计和实验演示，该表面还提供微波频率的自旋选择相调制。我们通过利用Pancharatnam-Berry相的理论和级联的四个张量阻抗层来实现这一目标，每个均包含一系列交叉的曲折线。这些曲折线经过精确调整并旋转以实现特定的张量表面阻抗值，以满足传输的右圆形圆形圆形场的阻抗匹配条件，同时诱导pancharatnam-berry相移的左手左手圆形圆形循环磁场。我们提出了一种详细的数值合成技术，以获得满足阻抗匹配条件的所需阻抗值，并基于Pancharatnam-berry相位移动，证明了自旋选择相位调制。为了验证所提出的想法，我们实验表明，在Broadsion Broadside 30度以12 GHz处的30度，在Broadside上几乎无反射的圆形极化以及反射。为此，分别采用了自由空间准精光设置和近场测量系统来测量传输和反射的圆形偏振场。
This paper presents the design and experimental demonstration of an impedance-matched circular polarization selective surface which also offers spin-selective phase modulations at microwave frequencies. We achieve this by leveraging the theory of Pancharatnam-Berry phase and cascading four tensor impedance layers, each comprising an array of crossed meander lines. These meander lines are precisely tuned and rotated to implement particular tensor surface impedance values to satisfy the impedance-matching condition for the transmitted right-handed circularly-polarized field while inducing Pancharatnam-Berry phase shift for the reflected left-handed circularly-polarized field. We present a detailed numerical synthesis technique to obtain the required impedance values for satisfying the impedance matching condition, and demonstrate spin-selective phase modulations based on Pancharatnam-Berry phase shifts. To verify the proposed idea, we experimentally demonstrate nearly-reflectionless transmission of right-handed circular polarization at broadside and reflection of left-handed circular polarization at 30 degrees off broadside at 12 GHz. For this purpose, a free-space quasi-optical set up and a near-field measurement system are respectively employed for measuring the transmitted and reflected circularly-polarized fields.
