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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


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.

Original languageEnglish
Title of host publicationBiomedical Imaging and Sensing Conference 2021
EditorsToyohiko Yatagai, Yoshihisa Aizu, Osamu Matoba, Yasuhiro Awatsuji, Yuan Luo
ISBN (Electronic)9781510647190
StatePublished - 2021
EventBiomedical Imaging and Sensing Conference 2021 - Virtual, Online, Japan
Duration: 20 Apr 202122 Apr 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceBiomedical Imaging and Sensing Conference 2021
CityVirtual, Online


  • 3D metasurface
  • Broadband chiroptical responses
  • Optical chirality


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