Devices, such as light-emitting devices (e.g., LEDs), and methods
associated with such devices are provided. A light-emitting device may
include an interface including a first region and a second region. The
first region having a dielectric function that varies spatially according
to a first pattern, and the second region having a dielectric function
that varies spatially according to a second pattern, wherein the second
pattern is a rotation of the first pattern. A method of forming a
light-emitting device is provided. The method comprises forming an
interface comprising a first region and a second region. The first region
having a dielectric function that varies spatially according to a first
pattern, and the second region having a dielectric function that varies
spatially according to a second pattern, wherein the second pattern is a
rotation of the first pattern.