Terahertz polarization conversion and sensing with double-layer chiral metasurface

Zhang Zi-Yang¹, Fan Fei^{1, †}, Li Teng-Fei¹, Ji Yun-Yun¹, Chang Sheng-Jiang^{2, ‡}

(a) The THz-TDS signals of −45° and +45° polarization components for x-LP incidence when the thickness of the PVA film is 20 μm. (b) The corresponding transmission experimental spectra of LCP and RCP components of double-layer chiral metasurface.