Optimized dynamic control of photonic power dividers using Sb2Se3 phase-change materials

This paper explores the modelling of an integrated photonic power divider that utilizes the degree of crystallization of an Sb₂Se₃ phase-change material (PCM) patch to achieve variable power distribution ratios. The fraction of crystallinity of Sb₂Se₃, ranging from 0 to 1, provides a dynamic control mechanism for the device. Simulations were performed using a combination of optimization algorithms and wave optics interface within COMSOL Multiphysics^® to arrive at the optimum distribution of amorphous and crystalline fractions to achieve a required power distribution. The transmission coefficients serve as control variables to direct light to the upper or lower port, allowing the power divider to function as a reconfigurable and compact photonic device. These findings provide valuable insights into the use of PCMs for advancing photonic power dividers.