This paper presents three different PCF structures including circular, hexagonal, and square holes forming four rings. To investigate various optical properties, simulation has been performed in between 1 THz to 2 THz regimes. Using these PCF structures, the core power fraction (CPF), dispersion, confinement loss (CL), effective material loss (EML), effective area (A_eff), and propagation constant are analyzed. TOPAS is selected as the fiber material for these designed PCF structures. From the analysis, a larger CPF of 97.4% is attained for the square PCF, a small A_eff of 1.65 × 10⁵ μm², a negligible CL of 5.82 × 10⁻¹² cm⁻¹, and a lower EML of 0.014 cm⁻¹ are obtained for the hexagonal PCF. Besides, a negative dispersion is found for all three PCF structures. However, these PCFs can be fabricated using the prevailing fabrication technologies. Our designed PCFs can be efficiently used in optical signal transmission, also different kinds of analyte sensing can be performed by applying a suitable core structure into these PCFs.

本文介绍了三种不同的PCF结构，包括形成四个环的圆形，六边形和方形孔。为了研究各种光学特性，已经在1 THz至2 THz范围内进行了仿真。使用这些PCF结构，可以分析核心功率分数（CPF），色散，限制损耗（CL），有效材料损耗（EML），有效面积（A _eff）和传播常数。选择TOPAS作为这些设计的PCF结构的纤维材料。从分析的97.4％的较大CPF达到为方形PCF，小A _EFF的1.65×10 ⁵ 微米²，5.82×10具有可忽略的CL ^-12厘米^-1，和0.014厘米的较低EML ^{- 1个}获得六角形PCF。此外，对于所有三个PCF结构都发现负色散。但是，可以使用流行的制造技术来制造这些PCF。我们设计的PCF可以有效地用于光信号传输，也可以通过在这些PCF中应用合适的核心结构来执行不同种类的分析物检测。