فهرست نشریات علمی دسترسی آزاد ایران

In the structure of photonic crystals, preventing the return of light is one of the main challenges in photonics. This issue is crucial due to its significant impact on the permeability and accuracy of the photonic crystal. In this paper, an all-optical diode is designed to inhibit the return and backward propagation of light within the photonic crystal lattice. The proposed design incorporates a nonlinear directional coupler that enables phase changes depending on the input power level. The structure was analyzed using the Finite Difference Time Domain (FDTD) method and the Plane Wave Expansion (PWE) technique. The device's performance was assessed by investigating variations in wavelength, refractive index, and rod radius, demonstrating reliable operation across diverse conditions. Simulation results indicate that the proposed structure achieves a data transmission speed of approximately 1 Tbit/s with an input power requirement of around 3 watts.