Enhancing Computing Efficiency and Energy Sustainability: Integrated Photonic Multiplexers

Abstract

This study presents an innovative approach looking forward to design an all-optical compact 2*1 multiplexer gate based on two-dimensional photonic crystals. The structure comprises silicon rods arranged in an eight-shaped waveguide configuration within the background of air. Meticulously crafted using linear materials, the multiplexer overcomes challenges associated with low gain and nonlinearity. Functionality is achieved by considering interference and scattering effects of silicon defect rods. Advanced simulation methods, including Plane Wave Expansion (PWE) and Finite-Difference-Time-Domain (FDTD), assess performance, revealing notable specifications. Positioned as a promising candidate for integration into optical circuits, particularly for applications in optical networking and signal processing, the study underscores the compatibility and integrability of the proposed structure. Additionally, the incorporation of a quantum dot solar cell (QDSSC) at the end of the multiplexer enables the output signal to be converted into electrical form, facilitating storage even in the absence of light. This integration enhances the multiplexer's versatility and functionality in diverse optical communication and data processing applications.