Patent ID: 6967437

Claim:
A light-emitting diode (LED) comprising a plurality of layers overlying a transparent substrate, said substrate including a corrugated surface forming a grating, said layers including a transparent conductive anode overlying said corrugated surface, a light emitting layer overlying said conductive anode, and at least one electrode layer overlying said light emitting layer, wherein at least one of the layers overlying said corrugated surface of said substrate includes periodic microstructure means for manipulating spontaneous emission and propagation of light by coupling non-radiative waveguide modes to far-field radiation, at least one of the transparent conductive anode, the light emitting layer and the at least one electrode layer overlying the light emitting layer including a corrugated surface for manipulating spontaneous emission and propogation of light by coupling non-radiative waveguide modes to far-field radiation.