In this research paper, a D-shape structure of photonic crystal fiber (PCF) is introduced. Here, prime optical transmission characteristics like as nonlinearity, numerical aperture (NA), effective area, confinement loss are obtained by selecting finer mesh and finite element method (FEM). Gallium phosphide (GaP), Tellurite, Silicon Nano Crystal, and Chalcogenide are separately used as a core material and they show better performance than previously published articles. Silicon nanocrystal provides the nonlinearity of 52358618.29 W⁻¹Km⁻¹, GaP of 3471273.165 W⁻¹Km⁻¹, chalcogenide of 3584986.3 W⁻¹Km⁻¹ and tellurite of 307870.6261 W⁻¹Km⁻¹ at the operating wavelength 0.1 μm. With our best of knowledge, the performance of different ceramics materials in optical nonlinear applications is evaluated for the first time. This structure also lends little mode area of 1.20 × 10⁻¹³ m², low confinement loss of 4.32 × 10⁻⁴ at the wavelength 0.1 μm and high numerical aperture of 0.86 at 1.5 μm. All these outcomes can play an important role in biomedical imaging, sensing, supercontinuum application, amplification of optical parameter, and other nonlinear applications.