Extremely low material loss and dispersion flattened TOPAS based circular porous fiber for long distance terahertz wave transmission

Department of Electrical and Electronic Engineering, Islamic University of Technology, Gazipur 1704, Bangladesh Department of Electrical and Electronic Engineering, Rajshahi University of Engineering & Technology, Rajshahi 6204, Bangladesh Department of Electrical and Electronic Engineering, Bangladesh University of Engineering & Technology, Dhaka 1000, Bangladesh Department of Communication Science and Engineering, School of Computational and Communication Science and Engineering, Nelson Mandela African Institution of Science and Technology, Arusha 23311, Tanzania e School of Electrical and Electronic Engineering, The University of Adelaide, SA 5005, Australia