3D Archimedean spiral metasurface for enhances broadband optical chirality

Hsin-Yu Kuo; Ming Lun Tseng; Zhan-Hong Lin; Yu-Jung Lu; Yuan Luo; Jer-Shing Huang; Din Ping Tsai

doi:10.1117/12.2615922

27 October 2021 3D Archimedean spiral metasurface for enhances broadband optical chirality

Hsin-Yu Kuo, Ming Lun Tseng, Zhan-Hong Lin, Yu-Jung Lu, Yuan Luo, Jer-Shing Huang, Din Ping Tsai

Proceedings Volume 11925, Biomedical Imaging and Sensing Conference 2021; 119251L (2021) https://doi.org/10.1117/12.2615922
Event: SPIE Technologies and Applications of Structured Light, 2021, Online, Japan

Abstract

Metasurfaces comprising 3D chiral structures have shown great potential in chiroptical applications such as chiral optical components and sensing. So far, the main challenges lie in the nanofabrication and the limited operational bandwidth. Here, we present an effective nanofabrication method to create a 3D chiral metasurface with far- and nearfield broadband chiroptical properties. A focused ion beam is used to cut and stretch nanowires into 3D Archimedean spirals from stacked films. The spiral exhibits far- and near-field broadband chiroptical responses from 2 to 8 μm. With circularly polarized light (CPL), the spiral shows superior far-field transmission dissymmetry and handedness-dependent near-field localization. The reported method and chiral metasurface may find applications in broadband chiral optics and chiral sensing.

Citation Download Citation

Hsin-Yu Kuo, Ming Lun Tseng, Zhan-Hong Lin, Yu-Jung Lu, Yuan Luo, Jer-Shing Huang, and Din Ping Tsai "3D Archimedean spiral metasurface for enhances broadband optical chirality", Proc. SPIE 11925, Biomedical Imaging and Sensing Conference 2021, 119251L (27 October 2021); https://doi.org/10.1117/12.2615922

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