Enhanced soliton steering in PT-symmetric couplers with nonlocal interactions

Abstract

This study investigated the enhanced dynamics of solitons in PT-symmetric couplers with nonlocal interactions. PT-symmetric waveguide arrays, characterized by balanced gain and loss, exhibit unique properties such as nonreciprocal light propagation and unidirectional invisibility. By incorporating nonlocal interactions, where the response at a point depends on the extended region’s state, we explore how these couplers achieve superior soliton stability, reduced critical power, and improved transmission efficiency. Numerical simulations reveal that PT-symmetric couplers with nonlocal terms significantly outperform conventional couplers in terms of steering dynamics, energy transfer, and phase coherence. The results demonstrate that nonlocal interactions, whether focusing or defocusing, play a crucial role in optimizing soliton propagation in PT-symmetric systems. These findings provide valuable insights for designing high-performance optical devices, highlighting the potential of PT-symmetric waveguide arrays with nonlocal nonlinearities to revolutionize optical communication technologies. This research underscores the importance of nonlocal interactions in enhancing the capabilities of PT-symmetric optical systems.