High birefringence, low loss, and flattened dispersion photonic crystal fiber for terahertz application Project supported by the National Natural Science Foundation of China (Grant No. 11604260) and the Outstanding Youth Science Fund of Xi’an University of Science and Technology, China (Grant No. 2019YQ3-10). |
Birefringence and loss (EML and CL) versus cladding hole ring number at 1 THz, with inset showing magnified variation trend of CL (Λ = 200 μm, t = 0.015Λ, core porosity = 55%). |