Characterization of an integrated polarization splitting grating coupler

In this study, we present the design and analysis of a polarization splitter based on a 2D-1D grating-dielectric structure (GDS). The polarization splitter is a crucial component in photonic integrated circuits, facilitating the separation of orthogonal polarization states for various applications in optical communication and signal processing. Our design leverages the unique properties of two-dimensional (2D) grating coupler (GC) structures interfaced with one-dimensional (1D) dielectric waveguides to achieve high polarization selectivity and low insertion loss. Through rigorous computational simulations and optimization, we demonstrate that the proposed splitter exhibits efficient polarization separation with minimal cross-talk and a broad operational bandwidth. Additionally, the compact footprint of the splitter makes it suitable for integration into densely packed photonic circuits. This work provides a viable pathway for developing advanced polarization management components in integrated photonics, potentially enhancing the performance and functionality of future optical systems.