Challenges and opportunities in modeling and optimization of 3D optical metasurfaces

Planar meta-lenses, such as the v-antenna lens, are usually designed by varying two physical parameters of the v-antenna (arm length and central angle spread) and identifying a collection of antennas to discretize a modulo 2π phase swing with high transmission amplitude. Translation of the v-antenna structure into a vertically oriented antenna in a 2-dimensional array increases the necessary design parameter space, bringing to bear additional polarization and configurational possibilities which do not exist in the planar version. This talk will outline this increase in parameter space and the challenges and opportunities it presents.