Highly directive optical radiating structure with circular and diamond shape Si perturbations

Abstract

In this manuscript, silicon nitride (Si3N4) waveguide loaded with silicon perturbations is proposed. The rectangular and diamond shape perturbations of silicon material are created in Silicon nitride waveguide placed over Silicon on insulator (SOI) substrate. The simulation results show that the proposed design is more efficient compared to the existing designs. We obtain the simulation results of the proposed design in terms of reflectance, transmittance, far-field radiation pattern and half power beam width (HPBW). Our results lead to SOI-based optical radiating structure design in the third and fourth window of optical communication. The efficiency of the radiating structure is increased by introducing circular and diamond shape silicon perturbation in the waveguide. The directive and efficient response of optical radiating structure designs are applicable in medical imaging and sensing.