超材料
材料科学
太赫兹辐射
谐振器
分裂环谐振器
极化(电化学)
偏振旋转器
光学
双折射
光电子学
物理
化学
物理化学
作者
Yi-Ju Chiang,Ta‐Jen Yen
摘要
We integrated the polarization convertibility of asymmetric split-ring resonators with the polarization selectivity of S-shape resonators for realizing a composite-metamaterial-based 90-degree ultrathin polarization rotator (UTPR) with a 50.4-μm thickness in the terahertz-gap region. By introducing the Fabry-Perot resonance into the UTPR, the measured transmission is maximized to 0.48 at 1.04 THz, leading to the polarization-conversion ratio up to 97.7%. Compared to other waveplates composed by pile-stacking birefringent metamaterials, the UTPR possesses less loss from the intrinsic resonances because it comprises only two layers of the resonators, and can evade from dichroism effects due to the unique working mechanism.
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