Mid-infrared fiat-topped broadband chiral helix metamaterials based on indium tin oxide and their chiral properties

• 作者: Wentao Zhang Weijie Shi Hui Guo Changchun Yan
• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2021,（11）
• 所属期刊栏目: Optical Materials
• 页码范围: 72-76
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL202119.111601

摘要

We proposed a periodic mid-infrared broadband chiral structure.Its unit cell consists of four indium tin oxide[ITO]helix subunits with different radii.The simulation results show that the flat-topped broadband circular dichroism[CD]can be achieved in the mid-infrared band by optimizing the parameters of helix structures.The simulation results also show that compared with the metallic[Ag and Au]helix structures,the ITO helix structure proposed exhibits evidently better broad-band CD and optical activity,which provides a new idea for the design of broadband polarization state control devices in the mid-infrared band.