Generation of Concentric Space-Variant Linear Polarized Light by Dielectric Metalens

Wen Hao Chang, Jun Han Lin, Chieh Hsiung Kuan, Ssu Yen Huang, Yann Wen Lan*, Ting Hua Lu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Miniaturized flat and ultrathin optical components with spatial and polarization degrees of freedom are important for optical communications. Here, we use nanostructures that act as tiny phase plates on a dielectric metalens to generate a concentric polarization beam with different orientations along the radial direction. The important discoveries are that (1) the circularly polarized light can be converted into linearly polarized states with a different orientation at near field and that (2) this orientation is strongly correlated to the rotation of the nanostructures on the metalens. Stokes parameters are utilized to investigate the comprehensive polarization states embedded in the optical intensity along the propagation direction. The variation of the spatial polarization states transformed by the dielectric metalens can be properly mapped onto the Poincaré sphere. We believe that the variety of spatial polarizations within a miniaturized configuration provides a new degree of freedom for diverse applications in the future.

原文英語
頁(從 - 到)562-568
頁數7
期刊Nano Letters
21
發行號1
DOIs
出版狀態接受/付印 - 2021

ASJC Scopus subject areas

  • 生物工程
  • 化學 (全部)
  • 材料科學(全部)
  • 凝聚態物理學
  • 機械工業

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