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Novel HRS-Based Porous Core Photonic Crystal Fibre for Terahertz Wave Guidance

Izaddeen Yakasai 1, Pg Emeroylariffion Abas 1, Shubi Kaijage 2, and Feroza Begum 1
1. Faculty of Integrated Technologies, Universiti Brunei Darussalam, Gadong BE 1410, Brunei Darussalam
2. School of Computational and Communication Science and Engineering, Nelson Mandela African Institution of Science and Technology, Arusha 23311, Tanzania

Abstract—A novel Porous Core Photonic Crystal Fibre (PC-PCF) with high birefringence and extremely low transmission loss is proposed and investigated. High birefringence is achieved by using high resistivity float zone silicon as background dielectric material. Simulation results demonstrate that the proposed PC-PCF has a birefringence above 0.9, Effective Material Loss (EML) of 0.012 cm-1 and 0.0038 cm-1 and confinement losses in the order of 10-19 and 10-7 for X- and Y-orthogonal fundamental modes, respectively, at frequency 1.3 THz. It is shown that whilst maintaining its high birefringence, the X-polarisation mode shows low total losses in a wider frequency range than the Y-polarisation mode. Moreover, variation of the core power fraction and effective modal area with frequency is carefully studied. The proposed PC-PCF comprises of simple geometry in both core and cladding and thus can be easily fabricated using existing fabrication technologies. Its high birefringence makes it potentially suitable for integration in applications such as terahertz medical imaging, terahertz filtering, terahertz interferometry, and sensing. 

Index Terms―birefringence, effective material loss, porous core photonic crystal fibre, terahertz

Cite: Izaddeen Yakasai, Pg Emeroylariffion Abas, Shubi Kaijage, and Feroza Begum, "Novel HRS-Based Porous Core Photonic Crystal Fibre for Terahertz Wave Guidance," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 9, No. 1, pp. 62-67, January 2020. Doi: 10.18178/ijeetc.9.1.62-67