Polarization router in radiative near-field based on dielectric nano-elliptical cylinders

Qiu Chun Zeng, Wei Lun Hsu, Chun Yuan Wang, Yen Chun Chen, Che Chin Chen, Yu Hsin Lin, Fong Zhi Chen, Chih Ming Wang

Research output: Contribution to journalArticlepeer-review


We propose a metasurface-based polarization router constructed by nano-elliptical cylinders. The router combines the functions of lens and blaze grating to sort harvest and sort polarized light in the radiative near-field. Different from most metasurfaces, which usually aim for 2π phase modulation, the TiO2 meta-atom, with complex amplitude modulation, has a thickness of only 300 nm corresponding to π phase modulation. Though simultaneously manipulating the amplitude and phase of the meta-atom, we demonstrated a polarization router with exceptional capabilities in splitting both x- and y-polarization light in the radiative near-field. Blocking factors monitored at the corresponding x- and y-polarization pixels are 16.33 and 29.19, respectively. These remarkable results pave the way for promising applications, such as automotive sensing and polarization imaging.

Original languageEnglish
Article number107976
JournalMaterials Science in Semiconductor Processing
StatePublished - Feb 2024


  • Metasurface
  • Polarization
  • Router


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