• Photonics Research
  • Vol. 9, Issue 11, 11002190 (2021)
Yiwu Yuan1, Jierong Cheng1、2、*, Fei Fan1, Xianghui Wang1, and Shengjiang Chang2、3
Author Affiliations
  • 1Institute of Modern Optics, Nankai University, Tianjin 300350, China
  • 2Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China
  • 3Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin 300350, China
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    Abstract

    Compared with traditional optical elements, metasurfaces have shown unique advantages in multifunctionality encoded in different frequencies, polarization states, and orbital angular momentums. However, the study of metasurfaces with well-controlled functions under different incident angles is still in its infancy. Here we propose a general method to tailor the angular dispersion over the simplest binary dielectric grating in the transmission mode. We demonstrate that the angular response is strongly related to the number of waveguide modes inside the grating, so one can intentionally reduce or enhance the angular dispersion by controlling the number of waveguide modes. Independent phase manipulation over incident angles is experimentally demonstrated by a metalens with angle-dependent focus. The angular dispersion in orthogonal polarization states is further utilized to demonstrate angle-insensitive and angle-multiplexed wave plates. These devices with simple configuration and clear physics offer a general platform to expand the scope of beam manipulation over metasurfaces.
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    Yiwu Yuan, Jierong Cheng, Fei Fan, Xianghui Wang, Shengjiang Chang. Control of angular dispersion in dielectric gratings for multifunctional wavefront shaping and dynamic polarization conversion[J]. Photonics Research, 2021, 9(11): 11002190
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    Category: Optical Devices
    Received: Jun. 11, 2021
    Accepted: Sep. 10, 2021
    Published Online: Oct. 14, 2021
    The Author Email: Jierong Cheng (chengjr@nankai.edu.cn)