Stanford researchers have developed flat, ultrathin (sub 100nm) optical elements based on high index nanostructures which can be alternatives to refractive optical elements such as gratings, lenses, and axicons.
This invention facilitates the realization of optical elements with spatially multiplexed/interleaved phase profiles to achieve a high packing density of distinct optical elements on a surface.
Stanford inventors have developed a method that allows for simultaneous 3D imaging with high resolution by using a multifunctional metalens to replace the conventionally used microlens array in light-field imaging.