Broadband switchable terahertz half-/quarter-wave plate based on VO2-metal hybrid metasurface with over/underdamped transition

@article{Luo2021BroadbandST,
  title={Broadband switchable terahertz half-/quarter-wave plate based on VO2-metal hybrid metasurface with over/underdamped transition},
  author={Xiaoqing Luo and Fangrong Hu and Guangyuan Li},
  journal={Journal of Physics D: Applied Physics},
  year={2021},
  volume={54}
}
Dynamically switchable half-/quarter-wave plates have recently been the focus in the terahertz regime. Conventional design strategies lead to multilayer metamaterials or narrowband metasurfaces. Here we propose a novel design strategy and a VO2-metal hybrid metasurface for achieving broadband dynamically switchable half-/quarter-wave plate (HWP/QWP) based on the transition from the overdamped to the underdamped resonance. Simulation results show that, by varying the VO2 conductivity by three… 

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