Patent ID: 8536600

Claim:
A semiconductor light emitting diode (LED), comprising: a first and a second electrode for applying a voltage across an active region, disposed between a first type semiconductor layer and a second type semiconductor layer for generation of light, a light emitting surface for emitting said light, and a plurality of photonic crystals disposed between said light emitting surface and said active region, each photonic crystal comprising a plurality of holes formed in a top semiconductor layer in the LED, characterized in that at least two photonic crystals of a first and a second type, selected among said plurality of photonic crystals, are adapted to extract light from said active region and differ from each other with respect to at least one lattice parameter, each of said at least two photonic crystals being associated with a respective far field pattern, wherein an arrangement of said plurality of photonic crystals is provided to arrange said at least two photonic crystals, such that a far field pattern from the light generated in the LED is created by combining said respective far field patterns associated with each of said at least two photonic crystals, wherein the first photonic crystal type is confined to a first region of the light emitting surface and the second photonic crystal type is confined to a second region of the light emitting surface, wherein the first and second regions of the light emitting surface are adjacent to each other and do not overlap.