Bistable optical memory using topological cavity-edge waveguide composite structure

With the increasing demand for efficient data transfer, developing optical memory has gained significant importance due to its ability to alleviate the conversion time between optical and electric signals. However, current optical memory technologies are susceptible to environmental perturbations and fabrication imperfections. To overcome these limitations, we propose a novel composite structure that combines the topological corner-state cavity with the edge-state waveguide configuration, enabling robust bistable optical memory. Through the introduction of nonlinear optical material, our simulations demonstrate a resilient bistable effect, highlighting the potential for optical random access memory applications. In addition, the topological protection properties are confirmed by the robustness and defect independence of our composite structure.