Design and analysis of spider-web photonic crystal fiber in the terahertz regime.

In this paper, we have proposed a novel photonic crystal fiber (PCF) design having a spider-web (SW) cladding. The finite element method (FEM)-based COMSOL Multiphysics software has been used to investigate the guiding properties and performance of the fiber in the terahertz radiation regime. Detailed numerical analyses ensure that proposed fiber design possesses a low confinement loss ( ∼ 10 - 17 cm - 1 ) ) and low effective material loss (EML). The high core power fraction of 99 % and the effective mode area of 1.06 × 10 - 5 m 2 make this fiber an exception. V-parameter confirms the single-mode behavior of fiber over 0.1–3.0-THz frequency range. Thus, we can say that the proposed fiber can be useful in various applications of terahertz propagation such as broadband transmission, biosensors, and chemical sensors. [ABSTRACT FROM AUTHOR]