论文标题
通过电流注入，通过基于二氧化钒的二氧化钒的跨二氧化钒可切换实现的主动Terahertz四分之一波板的宽带操作
Broadband operation of active terahertz quarter-wave plate achieved with vanadium-dioxide-based metasurface switchable by current injection
论文作者
论文摘要
我们演示了使用二氧化钒的活跃跨表面实现的可切换Terahertz四分之一波板的宽带操作。为此，我们利用各向异性变形的棋盘板结构，这些结构呈现与深度调制兼容的宽带特征。此外，元表面与当前的注入电路集成在一起，以实现状态切换。该注射电路也可以用于监测二氧化钒的电状态。我们估计从制造的元表面的实验传输光谱得出的Stokes参数，并确认在设计频率为0.66THz的频率附近的圆形极化波的螺旋切换。相对带宽评估为0.52，比以前的研究宽度是4.2倍。
We demonstrate the broadband operation of a switchable terahertz quarter-wave plate achieved with an active metasurface employing vanadium dioxide. For this purpose, we utilize anisotropically deformed checkerboard structures, which present broadband characteristics compatible with deep modulation. Moreover, the metasurface is integrated with a current injection circuit to achieve state switching; this injection circuit can also be employed to monitor the electric state of vanadium dioxide. We estimate the Stokes parameters derived from the experimental transmission spectra of the fabricated metasurface and confirm the helicity switching of circularly polarized waves near a designed frequency of 0.66THz. The relative bandwidth is evaluated as 0.52, which is 4.2 times broader than that in a previous study.
