Optimizing the performance of CPML optical target for light-scattering simulations

An optical target constructed by modifying the convolutional perfectly matched layers (CPML) formulation is tested for applications in light-scattering simulations. The optical target is designed for finite-difference time-domain light-scattering simulations to eliminate and isolate impinging light. The performance of the optical target under different incident light and factors affecting the absorption efficiency is analyzed. Variations of the optical target geometry are tested for optimal absorption. Simulation results show that the absorption is most effective for normally impinging light; its absorption cross section can be effectively tuned by modifying the layers' conductivity profile. In scattering simulations, the performance of such absorbing medium can effectively absorb incident light from arbitrary directions within a light-scattering simulation.