Large and active circular dichroism in a photosensitive silicon based metasurface
Wenchang Zhu,
Huan Jiang,
Songliang Zhao
et al.
Abstract:Active circular dichroism (CD) is highly required for the flexible polarization control in modern terahertz (THz) systems. In this work, we numerically achieved large and active CD in THz region by optically controlling photosensitive silicon in a gold/silicon hybrid cross-shape metasurface. At the incident angle of 75°, the proposed metasurface exhibits large CD. By tuning the conductivity of photosensitive silicon with optical pump, the large CD (0.89) could be dynamically switched to 0.06 and the peak frequ… Show more
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.