OPTICAL GRATINGS HAVING NON-ALIGNED META-OPTICAL ELEMENTS

An example apparatus includes an optical grating having a first axis oriented in a first direction and a second axis oriented in a second direction different from the first direction, wherein a dimension of the optical grating along the first axis is greater than a dimension of the optical grating along the second axis. The optical grating includes cells arranged along the first direction, each of the cells including meta-atoms arranged along the first direction, wherein the meta-atoms in each particular one of the cells are not aligned with respect to the second direction and are arranged in an asymmetric manner about the first axis of the optical grating.