Assessment of polymer host-guest materials for all-optical photonic applications by COMSOL simulation

The advancement of nonlinear optics has driven interest in organic materials because of their significant third-order nonlinearity. Host–guest polymer materials containing organic dyes with high nonlinear efficiency show strong potential for future applications in nonlinear photonic integrated circuits. Such materials could be utilized in compact platforms such as ring resonators and spiral waveguides, where enhanced light–matter interaction is beneficial for nonlinear processes. As a first step toward the realization of these systems, the optimization and determination of suitable optical geometries are essential. In this work, COMSOL Multiphysics was employed to perform physically accurate numerical simulations. Based on these simulations, the parametric gain in a single-mode waveguide was evaluated. Our results show the potential of organic nonlinear materials for enabling compact, efficient, and versatile optical signal processing devices.