Jonathan Fan1
Stanford University1
In this talk, I will discuss new concepts in wavefront engineering based on freeform metasurface and metamaterial systems. First, I will discuss how broadband arbitrary birefringence responses can be realized and tuned using sets of freeform metagratings, which utilize microscale motions to enable birefringence control. Second, I will discuss how volumetric freeform metamaterials can utilize strong multi-scattering and non-local interactions to enable arbitrary and multi-functional wavefront responses. Third, I will discuss how the design of artificial freeform electromagnetic media can be accelerated by three orders of magnitude using neural network-based surrogate solvers and optimizers.