Aboulwafa M. Singer, Ahmed M. Heikal, Hamdi A. El-Mikati, Salah S. A. Obayya, and Mohamed Farhat O. Hameed. “Ultra-Low Loss and Flat Dispersion Circular Porous Core Photonic Crystal Fiber for Terahertz Waveguiding”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 35, no. 6, June 2020, pp. 709-17, https://journals.riverpublishers.com/index.php/ACES/article/view/7845.