Validation of a ray-based tool for metalens design and analysis

We present validation results of a ray-based metalens design tool. The following design examples are explored: (1) a single metalens, (2) a system with two metalenses, and (3) a hybrid metalens-refractive system. For each design example, we show that the ray-based tool can be used to design imaging system with high efficiency. Furthermore, the validation results show that the ray-based approach offers results that are in excellent agreement with more rigorous wave-based analyses.